Crosslinked polyethylene insulated cable with a protective structure

Abstract

The application relates to the technical field of cross-linked polyethylene insulated cables, and proposes a cross-linked polyethylene insulated cable with a protection structure, which comprises a conductor, an inner insulation layer, an outer insulation layer, an outer sheath, a sheath layer and a protection structure. The inner insulation layer is wrapped outside the conductor, a filler is arranged between the outer insulation layer and the inner insulation layer, the sheath layer is wrapped outside the outer insulation layer, the outer sheath is wrapped outside the sheath layer, the protection structure is detachably arranged outside the outer sheath, the protection structure comprises a mounting assembly, a protection plate and a sealing ring, the mounting assembly is detachably mounted outside the outer sheath, the protection plate is semicircular, the protection plate is connected outside the mounting assembly through buffer springs and buffer rods, and two sealing rings are arranged and connected to the two ends of the protection plate through telescopic sleeves. The above technical scheme is used for solving the problem that the cross-linked polyethylene insulated cable has poor protection performance and is prone to damage during laying in the prior art.

Description

Technical Field

[0001] This invention relates to the field of cross-linked polyethylene insulated cable technology, and more specifically, to a cross-linked polyethylene insulated cable with a protective structure. Background Technology

[0002] Cross-linked polyethylene insulated cable is a power cable that uses cross-linked polyethylene (XLPE) as the insulation layer. It is mainly used in fixed laying scenarios of power distribution networks or industrial equipment with a rated voltage of 0.6 / 1kV and below. It covers environments such as overhead, indoor, tunnel, and cable trench. The armored type can be directly buried and withstand mechanical external forces.

[0003] Cross-linked polyethylene insulated cables are made by cross-linking polyethylene to form a three-dimensional network structure, which combines chemical stability and high temperature resistance. Compared with traditional cables, they have higher current carrying capacity and mechanical strength. The products are divided into two categories: unarmored (for locations without external mechanical force) and armored (for direct burial and pressure resistance).

[0004] Although current cross-linked polyethylene cables have an armor layer that can guarantee the mechanical strength of the cable to a certain extent, their protective performance mainly relies on the wear resistance and protective performance of the outer sheath material itself. During the laying process, the cable may be scratched by foreign objects, resulting in damage, reducing the cable's service life, or causing leakage risks. Furthermore, it is also lacking in bending resistance. Summary of the Invention

[0005] This invention proposes a cross-linked polyethylene insulated cable with a protective structure to solve the problem that cross-linked polyethylene insulated cables in the prior art have poor protective performance and are easily damaged during the laying process.

[0006] The technical solution of the present invention is as follows:

[0007] A cross-linked polyethylene insulated cable with a protective structure includes a conductor, an inner insulation layer, an outer insulation layer, and an outer sheath. The inner insulation layer wraps around the outside of the conductor, and a filler is disposed between the outer insulation layer and the inner insulation layer. The cable also includes:

[0008] An armor layer, which wraps around the outside of the outer insulating layer, and an outer sheath, which wraps around the outside of the armor layer;

[0009] A protective structure, wherein multiple protective structures are provided, and the protective structures are detachably disposed outside the outer sheath, the protective structures comprising:

[0010] Mounting components, detachably mounted on the outside of the outer sheath, the mounting components comprising:

[0011] Mounting ring one and mounting ring two are semi-circular, and mounting ring one and mounting ring two are detachably connected by bolts to form a complete ring fitted on the outside of the outer sheath;

[0012] The protective plate is provided in two parts, and the protective plate is semi-circular. The protective plate is connected to the outside of the mounting assembly by a buffer spring and a buffer rod.

[0013] Two sealing rings are provided, and the sealing rings are connected to both ends of the protective plate through telescopic sleeves.

[0014] To reduce scratches on the protective plate, a rotating ring is also included. Both mounting ring one and mounting ring two have annular grooves that match the rotating ring. The rotating ring is a spliced ​​structure and is located inside the annular groove. The protective plate is connected to the outside of the rotating ring through the buffer spring and the buffer rod.

[0015] To reduce the resistance to the rotation of the rotating ring, multiple balls are rotatably connected to the rotating ring, and the balls are in contact with the inner wall of the annular groove.

[0016] To further improve the stability of the protective plate, a plurality of support rods are fixedly connected to the inner side of the protective plate, and a rotating roller is rotatably connected to the end of the support rod away from the protective plate, and the rotating roller is in contact with the outside of the outer sheath.

[0017] To improve the stability and sealing between the two protective plates, a sealing plate is fixedly connected to the end of the protective plate, and a limiting block is fixedly connected to the sealing plate. A limiting groove matching the limiting block is opened on the sealing plate.

[0018] To improve the stability of the sealing ring, a compression spring is connected between the sealing ring and the protective plate.

[0019] The working principle and beneficial effects of this invention are as follows:

[0020] 1. In this invention, mounting ring one and mounting ring two are spliced ​​together as a whole ring and fitted onto the outside of the outer sheath by bolts, and rotating rings are spliced ​​together as a whole ring and installed inside the rotating groove, thereby installing the protective plate on the outside of the outer sheath. The two protective plates form a cylindrical shape to protect the outside of the cable.

[0021] 2. In this invention, the compression spring makes two adjacent sealing rings stick together, and the sealing rings and the telescopic sleeve seal the space between two adjacent protective plates, providing more comprehensive protection for the cable and reducing scratches on the cable itself. At the same time, the telescopic sleeve can adapt to the bending and laying of the cable by extending and bending.

[0022] 3. In this invention, by rotating the rotating ring and using the elasticity of the buffer spring, when the protective plate is subjected to external impact or obstruction, the impact can be buffered by the compression of the buffer spring and buffer rod and the rotation of the rotating ring, thereby reducing the impact on the internal conductor of the cable and thus providing better protection for the cable.

[0023] 4. In this invention, through the splicing design of mounting ring one and mounting ring two, as well as the splicing design of rotating ring, specific damaged protective plates or telescopic sleeves can be disassembled and replaced without replacing the entire cable, thus reducing replacement costs.

[0024] 5. In this invention, the protective plate is supported by the support rod and the rotating roller, which further improves the protective effect of the protective plate on the cable. At the same time, the rotation of the rotating roller can make the protective plate rotate around the outer sheath, which buffers and absorbs the impact force and the friction force generated by external obstacles. Attached Figure Description

[0025] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0026] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0027] Figure 2 This is a side view of the planar structure of the present invention;

[0028] Figure 3 This is a schematic diagram of the structure of the multiple protective structures of the present invention;

[0029] Figure 4 This is a first-view structural schematic diagram of the support rod, rotating roller, protective structure, and rotating ring of the present invention.

[0030] Figure 5 This is a second-view structural schematic diagram of the support rod, rotating roller, protective structure, and rotating ring of the present invention.

[0031] Figure 6 This is a schematic diagram of the structure of the buffer spring, buffer rod, semi-ring, and ball bearing of the present invention;

[0032] Figure 7 For the present invention Figure 4 A magnified schematic diagram of the local structure at point A;

[0033] Figure 8 For the present invention Figure 4 A magnified schematic diagram of the structure at point B in the middle.

[0034] In the picture:

[0035] 1. Conductor; 2. Inner insulation layer; 3. Outer insulation layer; 4. Outer sheath; 5. Filler; 6. Support rod; 7. Roller; 8. Armor layer;

[0036] 101. Protective plate; 102. Buffer spring; 103. Buffer rod; 104. Sealing ring; 105. Telescopic sleeve; 106. Compression spring; 107. Sealing plate; 108. Limiting block;

[0037] 201. Install ring one; 202. Install ring two; 203. Anti-slip mat;

[0038] 301, semi-ring; 302, connecting plate; 303, ball bearing. Detailed Implementation

[0039] 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.

[0040] like Figures 1 to 8 As shown, this embodiment proposes a cross-linked polyethylene insulated cable with a protective structure, including a conductor 1, an inner insulation layer 2, an outer insulation layer 3, and an outer sheath 4. Multiple conductors 1 and inner insulation layers 2 are provided, with one inner insulation layer 2 corresponding to one conductor 1. The inner insulation layer 2 wraps around the outside of the conductor 1. A filler 5 is provided between the outer insulation layer 3 and the inner insulation layer 2. It also includes an armor layer 8 and a protective structure. The armor layer 8 wraps around the outside of the outer insulation layer 3, and the outer sheath 4 wraps around the outside of the armor layer 8. The armor layer 8 improves the strength of the cable and reduces damage to the conductor 1.

[0041] like Figures 1 to 8As shown, multiple protective structures are provided. These protective structures are detachably installed outside the outer sheath 4. Each protective structure includes a mounting assembly, a protective plate 101, and a sealing ring 104. The mounting assembly is detachably installed outside the outer sheath 4 and includes a first mounting ring 201 and a second mounting ring 202. Both the first and second mounting rings are semi-rings 301 in shape. They are detachably connected by bolts to form a complete ring that fits onto the outside of the outer sheath 4. The width of the first mounting ring 201 is greater than that of the second mounting ring 202. The end of the first mounting ring 201 has a mounting groove that matches the second mounting ring 202. The second mounting ring 202 is installed into the mounting groove. Both the first and second mounting rings 201 have... The system includes mounting screw holes, allowing mounting ring 202 to be fixed inside the mounting groove using bolts. This allows mounting rings 201 and 202 to be joined into a single ring and fitted onto the outside of the outer sheath 4. Anti-slip pads 203 are fixedly connected to the inner sides of mounting rings 201 and 202, ensuring their stability through contact with the outside of the outer sheath 4. Two protective plates 101 are provided, each shaped like a semi-ring 301. These plates are connected to the outside of the mounting assembly via buffer springs 102 and buffer rods 103. Two sealing rings 104 are provided, connected to both ends of the protective plate 101 via telescopic sleeves 105. The sealing rings 104 and the protective plate... A compression spring 106 connects the two protective plates 101. To improve the stability and sealing between the two protective plates 101, a sealing plate 107 is fixedly connected to the end of each protective plate 101. A limiting block 108 is fixedly connected to the sealing plate 107. A limiting groove matching the limiting block 108 is provided on the sealing plate 107. The cooperation between the limiting block 108 and the limiting groove can improve the stability between the two protective plates 101 and reduce the misalignment between them. The protective plates 101 are semi-cylindrical. The two protective plates 101 are closely joined together to form a cylinder and placed outside the outer sheath 4 to protect the outer sheath 4. At the same time, the sealing plate 107 improves the sealing between the two protective plates 101, reducing the entry of external dust and impurities, thereby protecting the electrical system. To provide better protection for the cable, mounting ring 1 201 and mounting ring 202 are installed outside the outer sheath 4, thereby installing the protective plate 101 outside the outer sheath 4 to protect the cable. The positions of two adjacent mounting components are adjusted to adjust the distance between two adjacent protective plates 101, so that two adjacent sealing rings 104 are pressed together under the action of the compression spring 106, thereby ensuring the sealing between the two protective structures, reducing the entry of external dust and impurities, and providing more comprehensive protection for the cable. The protective plate 101 is made of an elastic material, such as rubber, which allows the cable to be bent more freely. At the same time, the extension and bending of the telescopic sleeve 105 can adapt to the laying of the cable, allowing the cable to be bent.

[0042] like Figures 1 to 8 As shown, to reduce scratches on the protective plate 101, a rotating ring is also included. Both mounting ring one 201 and mounting ring two 202 have annular grooves that match the rotating ring. The rotating ring has a spliced ​​structure, consisting of two splicable semi-rings 301. One end of each semi-ring 301 is fixedly connected to a connecting plate 302, and the other end of each semi-ring 301 has a connecting groove that matches the connecting plate 302. The connecting plate 302 is fixed inside the connecting groove by connecting bolts. The protective plate 101 has an operating port for rotating the connecting bolts. The rotating ring is located inside the annular groove. The protective plate 101 is connected to the outside of the rotating ring via a buffer spring 102 and a buffer rod 103. Multiple ball bearings 303 are rotatably connected to the rotating ring, and the ball bearings 303 contact the inner wall of the annular groove. The connecting plate 302 is fixed inside the connecting groove by connecting bolts, splicing the two half-rings 301 into a complete circular rotating ring. The rotating ring is located inside the annular groove, which limits the movement of the rotating ring, ensuring the stability of the rotating ring and the protective plate 101. The buffer spring 102... The elasticity of the buffer rod 103 and the buffer bar 103 buffers the impact applied to the protective plate 101 from the outside. The heat generated by the bending of the buffer rod 103 absorbs the impact force, thereby reducing the damage of external impact to the conductor 1 inside the cable and extending the service life of the cable. At the same time, the rotation of the ball bearing 303 reduces the resistance to the rotation of the rotating ring and the protective plate 101. When the protective plate 101 is subjected to external impact or frictional resistance during the laying process, the rotation of the protective plate 101 can offset part of the impact and friction, reducing the rigid impact between the protective plate 101 and external materials, thereby reducing the damage to the protective plate 101 and providing better protection for the cable. When the protective plate 101 or the telescopic sleeve 105 is damaged by impact or long-term friction, the connection between the two half rings 301 can be released by loosening the connecting bolts, so that the rotating ring can be removed from the inside of the annular groove, the protective plate 101 can be disassembled, and then a new protective plate 101 and telescopic sleeve 105 can be replaced and installed in the original position by the rotating ring. This allows for convenient disassembly and replacement of specific damaged locations, reducing replacement costs.

[0043] like Figures 1 to 8 As shown, to further improve the stability of the protective plate 101, multiple support rods 6 are fixedly connected to the inner side of the protective plate 101. A rotating roller 7 is rotatably connected to the end of the support rod 6 away from the protective plate 101. The rotating roller 7 is in contact with the outside of the outer sheath 4, and the protective plate 101 is installed outside the mounting assembly. The rotating roller 7 is in contact with the outer wall of the outer sheath 4, and the axial direction of the rotating roller 7 is parallel to the axial direction of the outer sheath 4. The protective plate 101 is supported by the rotating roller 7 and the support rods 6, which improves the stability and compressive strength of the protective plate 101. At the same time, the rotation of the rotating roller 7 reduces the obstruction to the rotation of the protective plate 101 and the rotating ring. The rotation of the protective plate 101 and the rotating ring provides a certain degree of buffering against external friction and impact.

[0044] The working principle or usage process of this cross-linked polyethylene insulated cable with protective structure is as follows:

[0045] Select an appropriate number of installation components and protective structures according to the length of the cable. Fit the installation ring 1 201 and installation ring 2 202 onto the outside of the outer sheath 4 and insert the installation ring 2 202 into the inside of the installation groove. Fix the installation ring 2 202 into the inside of the installation groove with bolts. Splice the installation ring 1 201 and installation ring 2 202 into a complete ring and make it in close contact with the outer wall of the outer sheath 4. Adjust the distance between two adjacent installation components so that it is slightly less than the length of the two compression springs 106.

[0046] Two semi-rings 301 are installed inside the annular groove, and the connecting plate 302 is inserted into the connecting groove. The connecting bolt is screwed in through the operating port to fix the connecting plate 302 inside the connecting groove. The two protective plates 101 are stably connected through the cooperation of the limiting block 108 and the limiting groove, so that the protective plate 101 is installed on the outside of the outer sheath 4.

[0047] Under the action of the compression spring 106, the two adjacent sealing rings 104 are driven to stick together. The telescopic sleeve 105 and the sealing ring 104 shield and protect the gap between the two adjacent protective plates 101, reducing the entry of external dust and impurities. At the same time, through the bending and extension of the telescopic sleeve 105 and the elasticity of the protective plate 101 itself, it can adapt to the bending and laying of the cable.

[0048] The outer sheath 4 is protected by the protective plate 101, the telescopic sleeve 105 and the sealing ring 104. At the same time, the elasticity of the buffer spring 102 and the buffer rod 103 buffers the external impact, reducing the damage to the internal conductor 1 of the cable. The protective plate 101 is supported by the support rod 6 and the rotating roller 7, which enhances the protective strength of the protective plate 101. The rotation of the protective plate 101 is achieved by the rotation of the rotating ring and the rotating roller 7. When the protective plate 101 is subjected to impact or friction, it can rotate to reduce the hard friction between the protective plate 101 and the external object, thereby protecting the protective plate 101.

[0049] When the protective plate 101 or the telescopic sleeve 105 is damaged, the connection between the two half rings 301 can be released by unscrewing the connecting bolts through the operating port, so that the protective plate 101 and the rotating ring can be removed from the cable and replaced.

[0050] 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 insulated cable with a protective structure, comprising a conductor (1), an inner insulation layer (2), an outer insulation layer (3), and an outer sheath (4), wherein the inner insulation layer (2) wraps around the outside of the conductor (1), and a filler (5) is disposed between the outer insulation layer (3) and the inner insulation layer (2), characterized in that, Also includes: The armor layer (8) is wrapped around the outside of the outer insulation layer (3), and the outer sheath (4) is wrapped around the outside of the armor layer (8); A protective structure, wherein multiple protective structures are provided, and the protective structures are detachably disposed outside the outer sheath (4), the protective structures comprising: Mounting assembly, detachably mounted on the outside of the outer sheath (4), the mounting assembly comprising: Mounting ring one (201) and mounting ring two (202), the mounting ring one (201) and mounting ring two (202) are semi-ring-shaped, the mounting ring one (201) and the mounting ring two (202) are detachably connected by bolts to form a whole ring fitted on the outside of the outer sheath (4); Two protective plates (101) are provided. The protective plates (101) are semi-circular. The protective plates (101) are connected to the outside of the mounting assembly by buffer springs (102) and buffer rods (103). Two sealing rings (104) are provided. The sealing rings (104) are connected to both ends of the protective plate (101) through telescopic sleeves (105). A compression spring (106) is connected between the sealing rings (104) and the protective plate (101). The rotating ring has an annular groove matching the rotating ring on both the mounting ring one (201) and the mounting ring two (202). The rotating ring is a spliced ​​structure. The rotating ring is located inside the annular groove. The protective plate (101) is connected to the outside of the rotating ring through the buffer spring (102) and the buffer rod (103). The rotating ring is configured as two splicable half rings (301). One end of the half ring (301) is fixedly connected to the connecting plate (302). The other end of the half ring (301) has a connecting groove matching the connecting plate (302). The connecting plate (302) is fixed inside the connecting groove by connecting bolts. The protective plate (101) has an operating port for rotating the connecting bolts. Multiple support rods (6) are fixedly connected to the inner side of the protective plate (101). A rotating roller (7) is rotatably connected to one end of the support rod (6) away from the protective plate (101). The rotating roller (7) is in contact with the outside of the outer sheath (4).

2. The cross-linked polyethylene insulated cable with a protective structure according to claim 1, characterized in that, Multiple balls (303) are rotatably connected to the rotating ring, and the balls (303) are in contact with the inner wall of the annular groove.

3. A cross-linked polyethylene insulated cable with a protective structure according to claim 2, characterized in that, A sealing plate (107) is fixedly connected to the end of the protective plate (101), and a limiting block (108) is fixedly connected to the sealing plate (107). A limiting groove matching the limiting block (108) is opened on the sealing plate (107).

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