High-temperature-resistant anti-cracking power cable

Abstract

The utility model discloses a high-temperature-resistant anti-cracking power cable. The high-temperature-resistant and anti-cracking power cable comprises at least two wire cores used for conducting electricity, an insulating sleeve used for insulating the wire cores, a retainer used for isolating the wire cores, a filling layer used for preventing the wire cores from moving, a flame-retardant layer used for flame retardance, a heat-insulating layer used for heat insulation and a wear-resistant layer used for protecting internal parts of the power cable, each wire core is wrapped with an insulating sleeve, the wire cores are arranged in the holder, the holder is arranged in the flame-retardant layer, the filling layer is filled in a gap between the holder and the flame-retardant layer, the heat insulation layer is arranged outside the flame-retardant layer, the wear-resistant layer is arranged outside the heat insulation layer, a plurality of first avoiding grooves are formed in the inner side wall of the heat insulation layer, and the outer side wall of the heat insulation layer is provided with a plurality of second avoiding grooves. The first receding grooves are evenly distributed in the heat insulation layer, and each first receding groove is formed in the length direction of the heat insulation layer. The high-temperature-resistant anti-cracking power cable provided by the utility model is low in cracking possibility and resistant to high temperature.

Description

Technical Field

[0001] This utility model relates to the field of cable technology, and in particular to a high-temperature resistant and crack-resistant power cable. Background Technology

[0002] Power cables, as a crucial carrier for transmitting and distributing electrical energy, are widely used in urban underground power grids, power plant lead-out lines, internal power supply in industrial and mining enterprises, and underwater transmission lines across rivers and seas. Their proportion in power lines is gradually increasing, making them an indispensable component of the main power system lines. When subjected to compression or external impact, cables are easily deformed and damaged, which in turn affects their insulation performance, leading to problems such as electrical short circuits or insulation failure. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a high-temperature resistant and crack-resistant power cable that can prevent breakage.

[0004] To address the aforementioned problems, this utility model provides a high-temperature resistant and crack-resistant power cable. The high-temperature resistant and crack-resistant power cable includes conductive cores, an insulating sleeve for insulating the cores, a retainer for isolating the cores, a filler layer to prevent core movement, a flame-retardant layer, a heat-insulating layer, and a wear-resistant layer to protect its internal components. The cable comprises at least two cores, each encased in an insulating sleeve. The cores are placed within the retainer, which is located within the flame-retardant layer. The filler layer fills the gap between the retainer and the flame-retardant layer. The heat-insulating layer and the wear-resistant layer are located outside the heat-insulating layer. The inner wall of the heat-insulating layer has multiple first clearance grooves, evenly distributed along the length of the heat-insulating layer.

[0005] Furthermore, the inner wall of the wear-resistant layer is provided with a plurality of second clearance grooves, which are evenly distributed in the wear-resistant layer, and each second clearance groove is provided along the length direction of the wear-resistant layer.

[0006] Furthermore, the retainer has at least two placement slots, which are evenly distributed on the retainer and are independent of each other. The placement slots are used to place the wire cores.

[0007] Furthermore, the radius of the placement groove is the same as the radius of the insulating sleeve disposed on the wire core.

[0008] Furthermore, the retainer includes at least one retaining plate, which is evenly distributed in a radial pattern. The retaining plates are connected at the center of the flame-retardant layer, and the connecting ends of the retaining plates are smoothly transitioned to adjacent retaining plates to form placement grooves.

[0009] Furthermore, the retaining plate is provided with radial grooves, and radial grooves are provided on both sides of the retaining plate, and the radial grooves are evenly arranged along the length direction of the retaining plate.

[0010] Furthermore, the radial grooves on both sides of the retaining plate are staggered.

[0011] Furthermore, the cage has a hollow hole at its center.

[0012] Furthermore, the insulating sleeve is made of soluble polytetrafluoroethylene, perfluoroethylene, or polyvinyl chloride.

[0013] Furthermore, the filler in the filling layer is a strip supported by a high-temperature resistant material.

[0014] This utility model discloses a high-temperature resistant and crack-resistant power cable with a first relief groove on the heat insulation layer, which enables the heat insulation layer to withstand impact and compression, avoids the heat insulation layer from cracking, and thus improves its service life. Attached Figure Description

[0015] Figure 1 This is a structural schematic diagram of a preferred embodiment of the high-temperature resistant and crack-resistant power cable of this utility model.

[0016] Figure 2 This is a cross-sectional view of a high-temperature resistant and crack-resistant power cable according to this utility model.

[0017] Figure 3 This is a schematic diagram of the cage structure.

[0018] The meanings of the labels in the attached diagram are as follows:

[0019] 1. Core wire, 2. Insulating sleeve, 3. Holder, 301. Placement groove, 31. Holder plate, 311. Radial groove, 4. Filling layer, 5. Flame retardant layer, 6. Heat insulation layer, 6. First clearance groove, 61. Wear-resistant layer, 7. Second clearance groove, 71. Detailed Implementation

[0020] The present invention will be further described below with reference to the accompanying drawings.

[0021] like Figure 1 and Figure 2As shown, a preferred embodiment of the high-temperature resistant and crack-resistant power cable of this utility model includes a conductor 1, a retainer 3, an insulating sleeve 2, a filling layer 4, a flame-retardant layer, a heat-insulating layer 6, and a wear-resistant layer 7. The conductor 1 is used for conducting electricity, and there are three conductors 1, each placed within the retainer 3. Each conductor 1 is housed within the insulating sleeve 2, which is used for insulation to prevent leakage. The insulating sleeve 2 is typically made of soluble polytetrafluoroethylene, perfluoroethylene propylene, or polyvinyl chloride. The flame-retardant layer is tubular, and the retainer 3 is located within it. The filling layer 4 fills the gap between the retainer 3 and the flame-retardant layer, thereby ensuring the conductor 1 fits snugly against the retainer 3. The filler in the filling layer 4 is typically a strip supported by a high-temperature resistant material, ensuring that the filling layer 4 can withstand the temperature of the conductor 1 and insulate against external high temperatures. The flame-retardant layer is used to delay or prevent combustion. The heat insulation layer 6 is located outside the flame-retardant layer and is used to insulate heat, thereby reducing the impact of external temperature on the interior of the heat insulation layer 6. The wear-resistant layer 7 is located outside the heat insulation layer 6 and is used to protect the internal structure from wear, thereby extending the service life of the cable. The wear-resistant layer 7 is typically made of polyvinyl chloride.

[0022] like Figure 3As shown, the retainer 3 has three placement slots 301, which are evenly distributed on the retainer 3. The three placement slots 301 are independent of each other, that is, they are not connected. The placement slots 301 are used to place the wire core 1. The retainer 3 is used to keep the three wire cores 1 independently spaced, thereby ensuring that the heat generated by the wire core 1 can be dispersed and will not accumulate together, while also limiting the position of the wire core 1. A hollow hole is provided in the center of the retainer 3, so that a through hole 302 is provided in the middle of the retainer 3, thereby improving the deformation capacity of the retainer 3. The retainer 3 includes three retaining plates 31, which are connected at the center of the flame retardant layer. The three retaining plates 31 are evenly distributed in a radial pattern. The connecting ends of the retaining plates 31 and the adjacent retaining plates 31 are smoothly transitioned to form the placement slots 301. The radius of the placement slots 301 is the same as the radius of the insulating sleeve 2 provided on the wire core 1. This allows the wire core 1 to fit well in the placement slots 301, thereby preventing the wire core 1 from moving towards the center of the retainer 3. The filling layer 4 fills the gap between two adjacent retaining plates 31, making the position of the wire core 1 more fixed. The retaining plate 31 is provided with radial grooves 311 on both sides. The radial grooves 311 on both sides of the retaining plate 31 are staggered to ensure the strength of the retaining plate 31. The radial grooves 311 are evenly arranged along the length of the retaining plate 31. This allows the retaining plate 31 to reduce the tensile force on the outer side of the bending deformation during bending, while creating a clearance space on the inner side of the bending deformation, increasing the bending angle of the inner side, thereby improving the bending deformation capability of the retainer 3. In this embodiment, the retainer 3 has three retaining plates 31. In other embodiments, the number of retaining plates 31 can be increased or decreased according to the needs, and the number of retaining plates 31 is increased or decreased according to the number of wire cores 1. The bending deformation of the retainer 3 is mainly suitable for axial bending deformation, that is, bending of the entire cable, making it easier to bundle bent cables.

[0023] The inner wall of the heat insulation layer 6 is provided with a plurality of first clearance grooves 61, which are evenly distributed in the heat insulation layer 6. Each first clearance groove 61 is arranged along the length of the heat insulation layer 6, thus forming clearance space on the inner side of the heat insulation layer 6. When subjected to external force squeezing or impact, the inner wall of the heat insulation layer 6 has enough space to deform, which improves the ability to withstand impact and squeezing and effectively prevents the heat insulation layer from breaking due to external force impact or squeezing.

[0024] The inner wall of the wear-resistant layer 7 is provided with a plurality of second clearance grooves 71, which are evenly distributed in the wear-resistant layer 7. Each second clearance groove 71 is arranged along the length of the wear-resistant layer 7, thus forming clearance space on the inner side of the wear-resistant layer 7. When subjected to external force squeezing or impact, the inner wall of the wear-resistant layer 7 has sufficient space to deform, which improves the ability to withstand impact and squeezing and effectively prevents cracking due to external force impact or squeezing.

[0025] A first clearance groove 61 and a second clearance groove 71 are correspondingly provided on the heat insulation layer 6 and the wear-resistant layer 7, so that the heat insulation layer 6 and the wear-resistant layer 7 can withstand impact and compression, preventing the heat insulation layer 6 and the wear-resistant layer 7 from cracking, thereby improving their service life. A radial groove 311 is provided on the retainer 3, which improves the bending deformation capacity of the retainer 3, making it easier to bend the cable and facilitates packaging.

[0026] The above are merely embodiments of this utility model and do not limit the patent scope of this utility model. Any equivalent structure made using the contents of this utility model specification and drawings, whether directly or indirectly applied to other related technical fields, shall also be within the patent protection scope of this utility model.

Claims

1. A high-temperature resistant and crack-resistant power cable, characterized in that: The device includes a conductor core, an insulating sleeve for insulating the conductor core, a retainer for isolating the conductor core, a filler layer for preventing conductor core movement, a flame-retardant layer for flame retardancy, a heat-insulating layer for heat insulation, and a wear-resistant layer for protecting its internal components. The device comprises at least two conductor cores, each encased in an insulating sleeve. The conductor cores are placed within the retainer, which is located within the flame-retardant layer. The filler layer fills the gap between the retainer and the flame-retardant layer. The heat-insulating layer is located outside the flame-retardant layer, and the wear-resistant layer is located outside the heat-insulating layer. The inner wall of the heat-insulating layer has multiple first clearance grooves, which are evenly distributed throughout the heat-insulating layer, with each first clearance groove extending along the length of the heat-insulating layer.

2. The high-temperature resistant and crack-resistant power cable as described in claim 1, characterized in that: The inner wall of the wear-resistant layer is provided with a plurality of second clearance grooves, which are evenly distributed in the wear-resistant layer, and each second clearance groove is provided along the length direction of the wear-resistant layer.

3. The high-temperature resistant and crack-resistant power cable as described in claim 1, characterized in that: The retainer has at least two placement slots, which are evenly distributed on the retainer and are independent of each other. The placement slots are used to place the wire cores.

4. The high-temperature resistant and crack-resistant power cable as described in claim 3, characterized in that: The radius of the placement groove is the same as the radius of the insulating sleeve provided on the wire core.

5. A high-temperature resistant and crack-resistant power cable as described in claim 3, characterized in that: The retainer includes at least one retaining plate, which is evenly distributed in a radial pattern. The retaining plates are connected at the center of the flame-retardant layer, and the connecting ends of the retaining plates are smoothly transitioned to form placement grooves.

6. A high-temperature resistant and crack-resistant power cable as described in claim 5, characterized in that: The retaining plate is provided with radial grooves, and radial grooves are provided on both sides of the retaining plate. The radial grooves are evenly arranged along the length direction of the retaining plate.

7. A high-temperature resistant and crack-resistant power cable as described in claim 6, characterized in that: The radial grooves on both sides of the retaining plate are staggered.

8. A high-temperature resistant and crack-resistant power cable as described in claim 1, characterized in that: The cage has a hollow hole at its center.

9. A high-temperature resistant and crack-resistant power cable as described in claim 1, characterized in that: The insulating sleeve is made of soluble polytetrafluoroethylene, perfluoroethylene, or polyvinyl chloride.

10. A high-temperature resistant and crack-resistant power cable as described in claim 1, characterized in that: The filler in the filling layer is a strip supported by a high-temperature resistant material.

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