A cross-linked polyethylene insulated polyolefin sheathed halogen-free low-smoke flame-retardant power cable

Abstract

The present invention discloses a cross-linked polyethylene insulated, polyolefin sheathed, halogen-free, low-smoke, flame-retardant power cable, comprising a cable body, the interior of which is provided with a first wrapping layer, a second wrapping layer, a third wrapping layer, a fourth wrapping layer, a fifth wrapping layer, a sixth wrapping layer, and a cable core arrangement layer, wherein the cable core arrangement layer is provided with a first cable core, a second cable core, a third cable core, and a fourth cable core. The present invention has the beneficial effects of having a compact structure, preventing cable twisting due to rotation during use, preventing cable collapse due to extrusion during burial, and extending the service life of the cable.

Description

Technical Field

[0001] The invention relates to the technical field of cables, in particular to a cross-linked polyethylene insulated polyolefin sheathed halogen-free low-smoke flame-retardant power cable. Background Art

[0002] The key features of halogen-free, low-smoke, flame-retardant wires and cables are that they contain no halogens and emit very little smoke when burned. Halogen-containing cables can be extremely toxic in a fire. If the concentration of a gas that could kill a person within 30 minutes is 1, the toxicity index of polyvinyl chloride is 15.01, while the toxicity index of halogen-free polymers is 0.79.

[0003] However, although the existing production method can produce halogen-free, low-smoke, flame-retardant wires and cables, it still has many defects: 1. The internal structure of the existing halogen-free, low-smoke, flame-retardant wires and cables is mainly composed of support columns, and they are tightly connected and matched. When the power cable is in use, torque will be generated, causing the cable to deform, thereby reducing the service life of the power cable. 2. In the process of use, the existing power cable will be squeezed in most cases, causing the cable cores at different positions to contact each other. During frequent use, due to friction, the cable is unsafe to use.

[0004] Based on the above technical defects, the present application urgently needs a cross-linked polyethylene insulated polyolefin sheathed halogen-free low-smoke flame-retardant power cable. Summary of the Invention

[0005] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a cross-linked polyethylene insulated polyolefin sheathed halogen-free low-smoke flame-retardant power cable with a compact structure, which prevents the cable from being twisted due to rotation during use and from being flattened due to extrusion during burial, thereby increasing the service life of the cable.

[0006] The object of the present invention is achieved by the following technical solution: a cross-linked polyethylene insulated polyolefin sheathed halogen-free low-smoke flame-retardant power cable, which includes a cable body, a first wrapping layer, a second wrapping layer, a third wrapping layer, a fourth wrapping layer, a fifth wrapping layer, a sixth wrapping layer and a cable core arrangement layer are provided on the interior of the cable body, and a cable core 1, a cable core 2, a cable core 3 and a cable core 4 are provided on the interior of the cable core arrangement layer;

[0007] The cable core one, cable core two, cable core three and cable core four, and the cable core one, cable core two, cable core three and cable core four are arranged at equal intervals in a plane, the cable core one, cable core two, cable core three and cable core four are cylindrical structures, and are all provided with cable wrapping layers on the outside, anti-pressure auxiliary strips are provided between the cable core one, cable core two, cable core three and cable core four, the cross-section of the anti-pressure auxiliary strip is a square structure, and the four corners on the anti-pressure auxiliary strip are respectively located between two adjacent cable cores, a fixed protrusion is provided on the outer wall of the cable wrapping layer, an anti-extrusion protrusion is provided between the sixth wrapping layer and the cable wrapping layer, and a groove one is provided on the anti-extrusion protrusion.

[0008] In the cross-linked polyethylene insulated polyolefin sheathed halogen-free low-smoke flame-retardant power cable of the present invention, the groove one and the fixed protrusion cooperate with each other, the fixed protrusion is provided with a fixed protrusion one and a fixed protrusion two, and the fixed protrusion one and the fixed protrusion two are both arranged around the cable wrapping layer, and the fixed protrusion one is wrapped around the cable wrapping layer as the first group, and the fixed protrusion two is wrapped around the cable wrapping layer as the second group, and the fixed protrusion two is arranged on both sides between two adjacent fixed protrusions one, and the first group and the second group are staggered.

[0009] In the cross-linked polyethylene insulated polyolefin sheathed halogen-free low-smoke flame-retardant power cable of the present invention, the sixth wrapping layer is provided with an upper sliding layer 1 and a lower sliding layer 2, a fixed protrusion 3 is provided below the lower sliding layer 2, a cavity is provided between the groove 1 and the fixed protrusion 1 or the fixed protrusion 2, a protrusion 4 is provided on the bottom of the upper sliding layer 1, the lower sliding layer 2 and the upper sliding layer 1 are connected in a sliding fit, and the protrusion 3 and the protrusion 4 have a limiting snap-fit function.

[0010] In the cross-linked polyethylene insulated polyolefin sheathed halogen-free low-smoke flame-retardant power cable of the present invention, a halogen-free low-smoke inner sheath layer 1 is provided on the outside of the fifth wrapping layer, and the halogen-free low-smoke inner sheath layer 1 is in a sealed state; the interior of the fourth wrapping layer is a cavity structure, and moisture-absorbing balls are provided between the interiors of the cavity structure, the moisture-absorbing balls are made of semi-rigid material, and the two ends of the moisture-absorbing balls are fixed between the fourth wrapping layers, the moisture-absorbing balls are on the outside of the halogen-free low-smoke inner sheath layer 1, and a waterproof layer is provided on the surface of the upper sliding layer 1.

[0011] A halogen-free, low-smoke, flame-retardant sheath layer 2 is further provided on the outside of the third wrapping layer, and the halogen-free, low-smoke, flame-retardant sheath layer 2 is arranged between the third wrapping layer and the second wrapping layer. A plurality of small through holes 1 are provided on the halogen-free, low-smoke, flame-retardant sheath layer 2, and the small through holes 1 are provided with a plurality of them. The small through holes 1 cooperate with the moisture-absorbing balls to fully absorb the moisture inside the cable.

[0012] In the cross-linked polyethylene insulated polyolefin sheathed halogen-free low-smoke flame-retardant power cable of the present invention, the first wrapping layer, the second wrapping layer and the third wrapping layer are tightly fitted, and the cable core one, the cable core two, the cable core three and the cable core four are all provided with a cross-linked polyethylene insulation layer, the surface of the cross-linked polyethylene insulation layer is fixedly provided with an inner shielding layer, the interior of the second wrapping layer is also provided with a support column, the first wrapping layer is provided with a wrapping layer one, a wrapping layer two, a wrapping layer three and a wrapping layer four, and the wrapping layer one, the wrapping layer two, the wrapping layer three and the wrapping layer four are integrally connected.

[0013] In the cross-linked polyethylene insulated polyolefin sheathed halogen-free low-smoke flame-retardant power cable of the present invention, the interior of the anti-pressure auxiliary strip is further provided with anti-pressure strip one, anti-pressure strip two, anti-pressure strip three and anti-pressure strip four, the middle part of the anti-pressure auxiliary strip is provided with support column two, the anti-pressure auxiliary strip, anti-pressure strip one, anti-pressure strip two, anti-pressure strip three, anti-pressure strip four and support column two are integrally formed, and the anti-pressure auxiliary strip also includes a first horizontal side, a second horizontal side, a third horizontal side and a fourth horizontal side.

[0014] In the cross-linked polyethylene insulated polyolefin sheathed halogen-free low-smoke flame-retardant power cable of the present invention, elastic arc-shaped anti-pressure grooves are provided on the first transverse side, the second transverse side, the third transverse side and the fourth transverse side, the elastic arc-shaped anti-pressure grooves are arranged between two adjacent anti-pressure strips, and cylindrical protrusions are provided on the inside of the elastic arc-shaped anti-pressure grooves; and cable core one, cable core two, cable core three and cable core four are arranged above the elastic arc-shaped anti-pressure grooves.

[0015] In the cross-linked polyethylene insulated polyolefin sheathed halogen-free low-smoke flame-retardant power cable of the present invention, the elastic arc-shaped anti-pressure grooves are intermittently arranged, and the distance between two adjacent elastic arc-shaped anti-pressure grooves is 2-5m.

[0016] The present invention has the following advantages:

[0017] 1. The cable body of the present invention is provided with a first wrapping layer, a second wrapping layer, a third wrapping layer, a fourth wrapping layer, a fifth wrapping layer, a sixth wrapping layer and a cable core arrangement layer on the interior of the cable body. The arrangement of the multiple wrapping layers improves the safety of the cable in use. The interior of the cable core arrangement layer is provided with a cable core 1, a cable core 2, a cable core 3 and a cable core 4, and the cable core 1, the cable core 2, the cable core 3 and the cable core 4 are arranged at equal intervals in the plane, so that there is no mutual influence between adjacent cable cores.

[0018] 2. The groove 1 and the fixed protrusion of the present invention cooperate with each other so that no sliding occurs during the extrusion process, and the cavities arranged on both sides can effectively relieve the pressure. The fixed protrusion is provided with a fixed protrusion 1 and a fixed protrusion 2, and both the fixed protrusion 1 and the fixed protrusion 2 are arranged around the cable wrapping layer, and the fixed protrusion 1 is wrapped around the cable wrapping layer as the first group, and the fixed protrusion 2 is wrapped around the cable wrapping layer as the second group, and the fixed protrusion 2 is arranged on both sides between two adjacent fixed protrusions 1. The first group and the second group are staggered, so that the density can be increased while the adjacent layers of the cable can be effectively kept tight.

[0019] 3. The sixth wrapping layer of the present invention is provided with an upper sliding layer 1 and a lower sliding layer 2, a fixed protrusion 3 is provided below the lower sliding layer 2, a cavity is provided between the groove 1 and the fixed protrusion 1 or the fixed protrusion 2, a protrusion 4 is provided on the bottom of the upper sliding layer 1, the lower sliding layer 2 and the upper sliding layer 1 are connected in a sliding fit, and the protrusion 3 and the protrusion 4 have a limiting snap-fit function. The upper sliding layer 1 and the lower sliding layer 2 prevent local twisting of the cable due to the limiting snap-fit function during rotation, thereby reducing the service life of the cable.

[0020] 4. The interior of the anti-pressure auxiliary strip of the present invention is also provided with anti-pressure strip one, anti-pressure strip two, anti-pressure strip three and anti-pressure strip four, and the middle part of the anti-pressure auxiliary strip is provided with a support column two. The anti-pressure auxiliary strip, anti-pressure strip one, anti-pressure strip two, anti-pressure strip three, anti-pressure strip four and support column two are integrally formed, and there are cavities between adjacent anti-pressure strips, so that during the deformation of the anti-pressure strip, due to the action of the cavities on both sides, it can be buffered under the action of the deformation of the elastic arc-shaped anti-pressure groove, so that the cable core is not easily displaced when under pressure. The anti-pressure auxiliary strip also includes a first horizontal side, a second horizontal side, a third horizontal side and a fourth horizontal side. The multi-sided setting enables indirect protection of the cable core. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a schematic diagram of the present invention;

[0022] Figure 2 It is a cross-sectional schematic diagram of the present invention;

[0023] Figure 3 This is a schematic structural diagram of the side surface of the anti-pressure auxiliary strip in the present invention;

[0024] Figure 4 Schematic diagram of the arrangement of the fixing protrusions in the present invention;

[0025] Figure 5 for Figure 2 A partial enlarged schematic diagram of point A in the middle;

[0026] Figure 6 for Figure 2A partial enlarged schematic diagram of point B in the middle;

[0027] Figure 7 for Figure 2 A partial enlarged schematic diagram of point C in the middle.

[0028] In the figure, the cable body 1, the first wrapping layer 2, the second wrapping layer 3, the third wrapping layer 4, the fourth wrapping layer 5, the fifth wrapping layer 6, the sixth wrapping layer 7, the cable core arrangement layer 8, the cable core 1 9, the cable core 2 10, the cable core 3 11, the cable core 4 12, the cable wrapping layer 13, the anti-pressure auxiliary strip 14, the fixing protrusion 15, the anti-extrusion protrusion 16, the groove 17, the fixing protrusion 1 18, the fixing protrusion 2 19, the upper sliding layer 1 20, Lower sliding layer 21, protrusion 3 22, protrusion 4 23, halogen-free low-smoke inner sheath layer 1 24, moisture-absorbing balls 25, halogen-free low-smoke flame-retardant sheath layer 2 26, small through hole 1 27, wrapping layer 1 28, wrapping layer 2 29, wrapping layer 3 30, wrapping layer 4 31, anti-pressure strip 1 32, anti-pressure strip 2 33, anti-pressure strip 3 34, anti-pressure strip 4 35, support column 2 36, first horizontal edge 37, elastic arc-shaped anti-pressure groove 38, cylindrical protrusion 39. DETAILED DESCRIPTION

[0029] The present invention will be further described below with reference to the accompanying drawings, and the protection scope of the present invention is not limited to the following:

[0030] like Figures 1 to 7 As shown, a cross-linked polyethylene insulated polyolefin sheathed halogen-free low-smoke flame-retardant power cable includes a cable body 1, a first wrapping layer 2, a second wrapping layer 3, a third wrapping layer 4, a fourth wrapping layer 5, a fifth wrapping layer 6, a sixth wrapping layer 7, and a cable core arrangement layer 8 are provided on the interior of the cable body 1, and a cable core 1 9, a cable core 2 10, a cable core 3 11, and a cable core 4 12 are provided on the interior of the cable core arrangement layer 8;

[0031] Cable core 1 9, cable core 2 10, cable core 3 11 and cable core 4 12, and cable core 1 9, cable core 2 10, cable core 3 11 and cable core 4 12 are arranged at equal intervals in the plane, cable core 1 9, cable core 2 10, cable core 3 11 and cable core 4 12 are cylindrical structures, and are all provided with cable wrapping layers 13 on the outside, and anti-pressure auxiliary strips 14 are provided between cable core 1 9, cable core 2 10, cable core 3 11 and cable core 4 12, and the cross section of the anti-pressure auxiliary strips 14 is a square structure, which protects the cable cores at various locations from Larger displacement. Compared with the cross-shaped and cylindrical supporting components, the four corners of the square structure are arranged between two adjacent cable cores, so that when under pressure, the four corners can be extended and retracted between the two adjacent cable cores, thereby ensuring that no large displacement occurs during the extrusion process, and the four corners on the anti-pressure auxiliary strip 14 are respectively located between two adjacent cable cores, a fixed protrusion 15 is provided on the outer wall of the cable wrapping layer 13, and an anti-extrusion protrusion 16 is provided between the sixth wrapping layer 7 and the cable wrapping layer 13, and a groove 17 is provided on the anti-extrusion protrusion 16.

[0032] The groove 17 and the fixed protrusion 15 cooperate with each other. The fixed protrusion 15 is provided with a fixed protrusion 18 and a fixed protrusion 2 19, and the fixed protrusion 18 and the fixed protrusion 2 19 are both arranged around the cable wrapping layer 13, and the fixed protrusion 18 around the cable wrapping layer is the first group, and the fixed protrusion 2 19 around the cable wrapping layer is the second group, and the fixed protrusion 2 19 is arranged on both sides between two adjacent fixed protrusions 18. The first group and the second group are staggered to ensure the tightness between the layers of the cable core.

[0033] The sixth wrapping layer 7 is provided with an upper sliding layer 20 and a lower sliding layer 21, a fixed protrusion 3 22 is provided below the lower sliding layer 21, a cavity is provided between the groove 17 and the fixed protrusion 18 or the fixed protrusion 2 19, and a protrusion 4 23 is provided on the bottom of the upper sliding layer 20. The lower sliding layer 21 and the upper sliding layer 1 20 are connected in a sliding fit, and the protrusion 3 22 and the protrusion 4 23 have a limiting snap-fit function, thereby preventing excessive sliding during use.

[0034] A halogen-free, low-smoke inner sheath layer 24 is provided on the outside of the fifth wrapping layer 6, and the halogen-free, low-smoke inner sheath layer 24 is in a sealed state; the interior of the fourth wrapping layer 5 is a cavity structure, and a moisture-absorbing ball 25 is provided between the interior of the cavity structure. The moisture-absorbing ball 25 is pre-embedded inside, and the moisture-absorbing ball 25 is made of semi-rigid material, and the two ends of the moisture-absorbing ball 25 are fixed between the fourth wrapping layer 5. The moisture-absorbing ball 25 is on the outside of the halogen-free, low-smoke inner sheath layer 24, and a waterproof layer is provided on the surface of the upper sliding layer 20. When there is a little moisture inside the cable core, it can be absorbed and blocked from entering other wrapping layers, and when the temperature rises, the moisture-absorbing ball will evaporate the moisture inside, and during normal use, the setting of the halogen-free, low-smoke inner sheath layer 24 prevents moisture from entering the cable core arrangement layer 8, effectively ensuring normal use.

[0035] A halogen-free low-smoke flame-retardant sheath layer 26 is further provided on the outside of the third wrapping layer 4. The halogen-free low-smoke flame-retardant sheath layer 26 is arranged between the third wrapping layer 4 and the second wrapping layer 3. A plurality of small through holes 27 are provided on the halogen-free low-smoke flame-retardant sheath layer 26. There are several small through holes 27. The small through holes 27 cooperate with the moisture-absorbing balls 25 to fully absorb the moisture inside the cable. The diameter of the small through holes 27 can be ignored, and moisture can enter the second wrapping layer 3 under the action of gravity.

[0036] The first wrapping layer 2, the second wrapping layer 3 and the third wrapping layer 4 are tightly fitted, and the cable core 1 9, the cable core 2 10, the cable core 3 11 and the cable core 4 12 are all provided with a cross-linked polyethylene insulation layer, an inner shielding layer is fixedly provided on the surface of the cross-linked polyethylene insulation layer, and a support column (not drawn in the figure) is also provided inside the second wrapping layer 3. The first wrapping layer 2 is provided with a wrapping layer 1 28, a wrapping layer 29, a wrapping layer 30 and a wrapping layer 4 31, and the wrapping layer 1 28, the wrapping layer 29, the wrapping layer 30 and the wrapping layer 4 31 are integrally connected.

[0037] The interior of the anti-pressure auxiliary strip 14 is also provided with an anti-pressure strip 1 32, an anti-pressure strip 2 33, an anti-pressure strip 34 and an anti-pressure strip 4 35, and the middle part of the anti-pressure auxiliary strip is provided with a support column 2 36. The anti-pressure auxiliary strip 14, the anti-pressure strip 1 32, the anti-pressure strip 2 33, the anti-pressure strip 34, the anti-pressure strip 4 35 and the support column 2 36 are integrally formed, and the anti-pressure auxiliary strip 14 also includes a first horizontal edge 37, a second horizontal edge, a third horizontal edge and a fourth horizontal edge.

[0038] Elastic arc-shaped anti-pressure grooves 38 are provided on the first horizontal side 37, the second horizontal side, the third horizontal side and the fourth horizontal side. The elastic arc-shaped anti-pressure grooves 38 are arranged between two adjacent anti-pressure strips. A cylindrical protrusion 39 is provided on the inside of the elastic arc-shaped anti-pressure grooves 38; and cable core 1 9, cable core 2 10, cable core 3 11 and cable core 4 12 are arranged above the elastic arc-shaped anti-pressure grooves 38.

[0039] The elastic arc-shaped anti-pressure grooves 38 are intermittently arranged, and the distance between two adjacent elastic arc-shaped anti-pressure grooves 38 is 2-5m.

[0040] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art will be able to modify the technical solutions described in the aforementioned embodiments or substitute equivalents for some of the technical features. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A cross-linked polyethylene insulated polyolefin sheathed halogen-free low-smoke flame-retardant power cable, characterized by: The cable comprises a cable body, wherein a first wrapping layer, a second wrapping layer, a third wrapping layer, a fourth wrapping layer, a fifth wrapping layer, a sixth wrapping layer and a cable core arrangement layer are arranged inside the cable body, and a cable core 1, a cable core 2, a cable core 3 and a cable core 4 are arranged inside the cable core arrangement layer; The cable core one, cable core two, cable core three and cable core four, and the cable core one, cable core two, cable core three and cable core four are arranged at equal intervals in a plane, the cable core one, cable core two, cable core three and cable core four are cylindrical structures, and are all provided with cable wrapping layers on the outside, anti-pressure auxiliary strips are provided between the cable core one, cable core two, cable core three and cable core four, the cross-section of the anti-pressure auxiliary strip is a square structure, and the four corners of the anti-pressure auxiliary strip are respectively located between two adjacent cable cores, a fixing protrusion is provided on the outer wall of the cable wrapping layer, an anti-extrusion protrusion is provided between the sixth wrapping layer and the cable wrapping layer, and a groove one is provided on the anti-extrusion protrusion; The groove 1 and the fixed protrusion cooperate with each other, and the fixed protrusion is provided with a fixed protrusion 1 and a fixed protrusion 2, and the fixed protrusion 1 and the fixed protrusion 2 are both arranged around the cable wrapping layer, and the fixed protrusion 1 around the cable wrapping layer is a first group, and the fixed protrusion 2 around the cable wrapping layer is a second group, and the fixed protrusion 2 is arranged on both sides between two adjacent fixed protrusions 1, and the first group and the second group are staggered; The sixth wrapping layer is provided with an upper sliding layer 1 and a lower sliding layer 2, a fixing protrusion 3 is provided below the lower sliding layer 2, a cavity is provided between the groove 1 and the fixing protrusion 1 or the fixing protrusion 2, and a protrusion 4 is provided on the bottom of the upper sliding layer 1. The lower sliding layer 2 and the upper sliding layer 1 are connected in a sliding manner, and the protrusion 3 and the protrusion 4 have a limit clamping effect; The interior of the anti-pressure auxiliary strip is also provided with anti-pressure strip one, anti-pressure strip two, anti-pressure strip three and anti-pressure strip four, and the middle part of the anti-pressure auxiliary strip is provided with support column two. The anti-pressure auxiliary strip, anti-pressure strip one, anti-pressure strip two, anti-pressure strip three, anti-pressure strip four and support column two are integrally formed, and the anti-pressure auxiliary strip also includes a first horizontal side, a second horizontal side, a third horizontal side and a fourth horizontal side.

2. The cross-linked polyethylene insulated polyolefin sheathed halogen-free low-smoke flame-retardant power cable according to claim 1, characterized in that: A halogen-free, low-smoke inner sheath layer 1 is provided on the outside of the fifth wrapping layer, and the halogen-free, low-smoke inner sheath layer 1 is in a sealed state; the interior of the fourth wrapping layer is a cavity structure, and moisture-absorbing balls are provided between the interiors of the cavity structure, and the moisture-absorbing balls are made of semi-rigid material, and the two ends of the moisture-absorbing balls are fixed between the fourth wrapping layers, and the moisture-absorbing balls are on the outside of the halogen-free, low-smoke inner sheath layer 1, and a waterproof layer is provided on the surface of the upper sliding layer 1.

3. The cross-linked polyethylene insulated polyolefin sheathed halogen-free low-smoke flame-retardant power cable according to claim 2, characterized in that: A halogen-free, low-smoke, flame-retardant sheath layer 2 is further provided on the outside of the third wrapping layer, and the halogen-free, low-smoke, flame-retardant sheath layer 2 is arranged between the third wrapping layer and the second wrapping layer. A plurality of small through holes 1 are provided on the halogen-free, low-smoke, flame-retardant sheath layer 2, and the small through holes 1 are provided with a plurality of them. The small through holes 1 cooperate with the moisture-absorbing balls to fully absorb the moisture inside the cable.

4. The cross-linked polyethylene insulated polyolefin sheathed halogen-free low-smoke flame-retardant power cable according to claim 3, characterized in that: The first wrapping layer, the second wrapping layer and the third wrapping layer are tightly fitted, and the cable core one, the cable core two, the cable core three and the cable core four are all provided with a cross-linked polyethylene insulation layer, the surface of the cross-linked polyethylene insulation layer is fixed with an inner shielding layer, and the interior of the second wrapping layer is also provided with a support column, the first wrapping layer is provided with a wrapping layer one, a wrapping layer two, a wrapping layer three and a wrapping layer four, and the wrapping layer one, the wrapping layer two, the wrapping layer three and the wrapping layer four are connected as a whole.

5. The cross-linked polyethylene insulated polyolefin sheathed halogen-free low-smoke flame-retardant power cable according to claim 4, characterized in that: Elastic arc-shaped anti-pressure grooves are provided on the first horizontal side, the second horizontal side, the third horizontal side and the fourth horizontal side. The elastic arc-shaped anti-pressure grooves are arranged between two adjacent anti-pressure strips. A cylindrical protrusion is provided on the inside of the elastic arc-shaped anti-pressure groove; and cable core one, cable core two, cable core three and cable core four are arranged above the elastic arc-shaped anti-pressure groove.

6. The cross-linked polyethylene insulated polyolefin sheathed halogen-free low-smoke flame-retardant power cable according to claim 5, characterized in that: The elastic arc-shaped anti-pressure grooves are intermittently arranged, and the distance between two adjacent elastic arc-shaped anti-pressure grooves is 2-5m.

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