Anti-seismic and corrosion-resistant polyethylene new energy cable

Abstract

The application relates to the cable technical field and discloses an anti-seismic and corrosion-resistant polyethylene new energy cable, which comprises four wire cores, the outer surfaces of the wire cores are provided with polyethylene insulation layers, the outer sides of the four wire cores are wrapped with four filling layers, the outer sides of the four filling layers are wrapped with braiding layers, the outer sides of the braiding layers are fixedly connected with protective layers, the protective layers are composed of 85% high-density polyethylene matrix and 15% perfluoropolyether elastomer, the outer sides of the protective layers are fixedly connected with multiple protrusions, the protrusions are semispherical, the tangent lines between adjacent two protrusions in the circumferential direction are located on the outer sides of the protective layers, and the protrusions are elastic materials. The elasticities of the protrusions and the protective layers can buffer the impact force received by the cable, the probability that the protective layer directly contacts the ground or other hard objects can be reduced under the support of the multiple protrusions, and thus the surface abrasion caused by friction can be obviously reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of cable, especially to an anti-seismic and corrosion-resistant polyethylene new energy cable. BACKGROUND

[0002] With the continuous growth of power demand and the continuous expansion of power grid scale, cross-linked polyethylene (XLPE) insulated power cables are widely used in long-distance, high-voltage grade power transmission projects due to their excellent electrical performance and good thermal stability. However, in the actual operation process, the cable often faces complex and changeable application environment and inevitably suffers from mechanical effects such as extrusion and dragging of external objects. These external forces will first cause local micro-wear on the surface of the cable outer protective layer. If not discovered and handled in time, these initial damages will gradually expand and evolve into obvious cracks or even breakage with the passage of time and repeated stress, seriously damaging the integrity of the cable outer protective layer.

[0003] Once the outer protective layer is damaged, the internal cross-linked polyethylene insulation layer will be directly exposed to the external environment, which is extremely susceptible to the influence of moisture, pollutants and mechanical further damage, resulting in a significant decline in its original excellent insulation performance. This not only weakens the safe operation ability of the cable system, but also may cause serious accidents such as electrical breakdown, leakage and short circuit, threatening the stability and power supply reliability of the power grid. SUMMARY

[0004] In order to overcome the problems presented in the above background art, the present application provides an anti-seismic and corrosion-resistant polyethylene new energy cable.

[0005] The technical solution of the present application is: an anti-seismic and corrosion-resistant polyethylene new energy cable, comprising four cores, the outer surface of the core is provided with a polyethylene insulation layer, the four cores are distributed equidistantly in the circumference, the outer side of the four cores is wrapped with four filling layers distributed equidistantly in the circumference, the outer side of the four filling layers is wrapped with a braided layer, the outer side of the braided layer is fixedly connected with a protective layer, the protective layer is composed of 85% high-density polyethylene matrix and 15% perfluoropolyether elastomer;

[0006] The outer side of the protective layer is fixedly connected with a plurality of protrusions uniformly distributed, the protrusions are semispherical, and the tangent line between adjacent two protrusions in the circumference is located on the outer side of the protective layer, and the protrusions are elastic materials, and the elastic coefficient of the protrusions is less than the elastic coefficient of the protective layer.

[0007] Further, a support is fixedly connected between the four cores, the support is an elastic material, the support is provided with a plurality of grooves uniformly distributed, and the grooves are used to provide the bending range of the support.

[0008] Further, the support member is cross-shaped in cross section, and four of the wire cores are respectively located at four corners of the support member, and the support member separates the four wire cores to ensure the spacing between two adjacent wire cores.

[0009] Further, the support member is provided with a through hole in the middle, and a plurality of holes are arranged in the groove of the support member in a circumferential equidistant manner, and the holes provide space for the circumferential torsion of the support member.

[0010] Further, the support member is provided with a through hole in the middle, and a plurality of holes are arranged in the groove of the support member in a circumferential equidistant manner, and the holes provide space for the circumferential torsion of the support member.

[0011] Further, the support member and the reinforcing rib have a gap therebetween, and a plurality of elastic rings are fixedly connected in the through hole of the support member, and the inner side of the elastic ring is fixedly connected with the reinforcing rib, and the plurality of elastic rings and the plurality of grooves are alternately distributed.

[0012] Further, four elastic sheets are arranged between two adjacent wire cores, and the elastic sheet is in contact with the support member and the adjacent filler layer, the elastic sheet is provided with a clamping groove, the filler layer is provided with a protruding strip, and the protruding strips of two adjacent filler layers are arranged in the clamping groove of the corresponding elastic sheet, and the inner side of the four elastic sheets is on a circular track, and the circular track is the torsion track of the outer edge of the support member.

[0013] Further, the elastic sheet is fixedly connected with a plurality of fixing blocks arranged uniformly, and the fixing blocks are located in the corresponding grooves.

[0014] Further, the outer side of each wire core is fixedly connected with a fixing frame composed of two parts, and the outer edge of the cross section of the fixing frame is a regular hexagon, and the filler layer, the support member, the elastic sheet and the fixing block are respectively in contact with the adjacent fixing frame, and the fixing frame is provided with a plurality of cavities arranged uniformly.

[0015] Further, a plurality of fixing columns arranged uniformly are embedded in the adjacent filler layer, and the fixing column is conical at one end outside the filler layer, and the fixing column penetrates the woven layer and is inserted into the protective layer, and the woven layer is spirally interwoven.

[0016] The beneficial effects are that: the cable is improved in corrosion resistance through the molecular-level corrosion-resistant network formed by the perfluoropolyether elastomer component in the protective layer, the impact force on the cable is buffered through the elasticity of the protrusions and the elasticity of the protective layer, and the probability of the protective layer directly contacting the ground or other hard objects is reduced under the support of the protrusions, so that the surface wear caused by friction is significantly reduced; the distance between the two adjacent cores is kept unchanged through the separation of the four cores by the support, and the mutual interference between the cores is reduced; the bending of the support is provided with a space through the groove arranged on the support, so that the cable is conveniently bent at a specified angle; the cable is provided with a plurality of cavities through the arrangement of the elastic sheet and the fixing block, so that the weight of the cable is reduced, and the cavities can absorb shock like springs, so that the shock resistance of the cable is improved; the support formed by the fixing frame reduces the change of the cross-sectional area and the resistance of the core, so that the normal operation of the cable is ensured; the fixed column penetrates the braided layer, so that when the cable is subjected to stretching, the fixed column can apply directional extrusion to the braided layer, so that uniform shrinkage deformation of the braided layer is caused, so that uniform distribution of tensile stress on the whole cable is realized, and the tensile performance and structural stability of the cable are improved. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is a three-dimensional structure schematic view of the present application;

[0018] Figure 2 is a sectional view of the present application at the core and the support;

[0019] Figure 3 is a structure schematic view of the present application at the support and the fixing frame;

[0020] Figure 4 is a three-dimensional structure schematic view of the present application at the reinforcing rib and the elastic ring;

[0021] Figure 5 is a three-dimensional structure schematic view of the present application at the elastic sheet and the fixing block;

[0022] Figure 6 is a sectional view of the present application at the elastic sheet and the fixing frame;

[0023] Figure 7 is an explosion view of the present application at the core and the fixing frame;

[0024] Figure 8 is a sectional view of the present application at the filling layer and the protective layer.

[0025] Part name and serial number in the figure: 1, core, 2, filler layer, 3, braided layer, 4, protective layer, 5, protrusion, 6, support, 601, groove, 602, hole, 7, reinforcing rib, 701, elastic ring, 8, elastic sheet, 801, fixed block, 9, fixed frame, 901, cavity, 10, fixed column. DETAILED DESCRIPTION

[0026] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings of the embodiments will be briefly introduced below. Obviously, the drawings described below only relate to some embodiments of the present application, and are not a limitation on the present application.

[0027] Embodiment 1: a kind of anti-seismic corrosion-resistant polyethylene new energy cable, as shown in Figure 1 and Figure 2 It includes four cores 1 distributed equidistantly in circumference, the outer surface of each core 1 is provided with a polyethylene insulating layer, the outer side of the four cores 1 is wrapped with four filler layers 2 distributed equidistantly in circumference, the filler layer 2 is foamed polyethylene material, 90% inside the filler layer 2 is closed small bubble, the outer side of the four filler layers 2 is wrapped with a braided layer 3, the braided layer 3 is aramid fiber, the outer side of the braided layer 3 is fixedly connected with a protective layer 4, the protective layer 4 is composed of 85% high-density polyethylene matrix and 15% perfluoropolyether elastomer, the high-density polyethylene matrix is used to make it have elasticity, and the perfluoropolyether elastomer is used to form a molecular level corrosion-resistant network to improve its corrosion resistance; the outer side of the protective layer 4 is fixedly connected with a plurality of protrusions 5 uniformly distributed, the protrusions 5 are semispherical, and the tangent line between adjacent two protrusions 5 in circumference is located on the outer side of the protective layer 4, so that when the cable contacts the ground, the outer edge of the protrusion 5 contacts the ground first, and the protrusion 5 is an elastic material, and the elastic coefficient of the protrusion 5 is less than that of the protective layer 4, the protrusion 5 and the protective layer 4 form a two-stage buffer structure, which enhances the anti-seismic performance of the cable, and according to the requirement, a sheath layer can also be wound between the braided layer 3 and the protective layer 4.

[0028] Specific working principle: in the assembly process of the cable, the four cores 1 are combined together, then the four filler layers 2 are wrapped outside the four cores 1, and at the same time, the braided layer 3 is wound outside the filler layer 2, to complete the preliminary assembly of the cable, then it is passed through the existing extruder, a protective layer 4 is wrapped outside the braided layer 3, and at the same time, the protrusions 5 uniformly distributed are sequentially bonded outside the protective layer 4, to complete the assembly of the cable.

[0029] After the cable is assembled, the probability of the protective layer 4 directly contacting the ground or other hard objects is reduced under the support of the protrusions 5 during use, thereby significantly reducing surface wear caused by friction. Meanwhile, the external extrusion force on the cable is effectively dispersed and buffered in stages under the double buffering of the protrusions 5 and the protective layer 4, thereby reducing the mechanical stress borne by the cable body, improving the adaptability and durability of the cable in complex laying environments, better maintaining the insulation performance and overall structural integrity of the cable, and ultimately improving the safety and reliability of the cable system operation.

[0030] In Example 2, based on Example 1, as shown in Figure 2 and Figure 3 The support member 6 is bonded between the four wire cores 1, is made of elastic material, is provided with a plurality of uniformly distributed grooves 601, and the grooves 601 are used to provide the bending range of the support member 6, facilitate the user to bend the cable, and at the same time, under the influence of the size of the grooves 601, after the support member 6 is bent to a specified angle, the inner wall sides of the grooves 601 are in close contact, forming a supporting effect, thereby avoiding excessive bending of the four wire cores 1 in the cable. The cross section of the support member 6 is in the shape of a cross, the four wire cores 1 are respectively located at the four corners of the support member 6, the separation of the support member 6 to the four wire cores 1 is used to ensure the distance between the adjacent two wire cores 1, the setting of the grooves 601 changes the support member 6 into a cylindrical segment and a cross-shaped segment, under the separation of the support member 6, the distance between the adjacent two wire cores 1 remains unchanged, reducing the mutual interference between the wire cores, and at the same time, the maintenance of the distance between the adjacent two wire cores 1 facilitates the rapid dissipation of heat generated by the work of the wire cores 1. The middle part of the support member 6 is provided with a through hole, and six hole holes 602 are arranged at each groove 601 of the support member 6, the hole holes 602 are located in the cylindrical segment of the support member 6, the setting of the hole holes 602 provides the torsion space of the cylindrical segment of the support member 6, facilitates the cable to be easily twisted within a certain range during use, and provides the activity space.

[0031] As shown in Figures 2-4 The support member 6 is provided with a reinforcing rib 7 in the through hole, there is a gap between the support member 6 and the reinforcing rib 7, the material of the reinforcing rib 7 is a shape memory polymer, which is used to assist the support member 6 to maintain the state after deformation, when the bending angle of the support member 6 is slightly large, under the action of the elastic recovery force generated by the deformation of the support member 6, the support member 6 and the reinforcing rib 7 are reversely deformed and reset, a plurality of elastic rings 701 are fixedly connected in the through hole of the support member 6, the inner side of the elastic ring 701 is fixedly connected with the reinforcing rib 7, and the setting of the reinforcing rib 7 improves the tensile property of the cable, and the plurality of elastic rings 701 and the plurality of grooves 601 are alternately distributed.

[0032] Specific working principle: on the basis of example 1, with the setting of support 6, reinforcing rib 7 and elastic ring 701, the cable ensures that the distance between the four cores 1 remains unchanged during compression, reduces the mutual interference between the cores, improves the working stability of the cable, and limits the maximum bending angle of the cable under the setting of groove 601, avoids the damage of the cable due to excessive bending, and facilitates the user to twist the cable at a specified angle under the setting of hole 602. When the cable is applied in the automobile charging pile, the twisting operation facilitates the user to easily connect the charging gun with the automobile charging port. At the same time, the setting of groove 601 and hole 602 forms a cavity in the cable, reduces the overall weight of the cable, and the cavity absorbs shock like a spring, further improving the shock resistance of the cable.

[0033] Example 3: on the basis of example 2, as shown in Figure 2 、 Figure 5 and Figure 6 , it further includes four elastic sheets 8, which are respectively arranged between adjacent two cores 1, and the elastic sheet 8 is in contact with the support 6 and the adjacent filling layer 2. Four elastic sheets 8 are provided with clamping grooves, both ends of the filling layer 2 are provided with protrusions, and the protrusions of adjacent two filling layers 2 are used to install in the clamping grooves of the corresponding elastic sheet 8. After the assembly of the four elastic sheets 8 and the four filling layers 2, the inner side of the four elastic sheets 8 is on a circular track, and the circular track is the torsional trajectory of the outer edge of the support 6, which facilitates the torsional deformation of the support 6; the elastic sheet 8 is fixedly connected with a plurality of fixing blocks 801 which are uniformly distributed, and the fixing block 801 is located in the corresponding recess 601. The left and right sides of the fixing block 801 are inclined surfaces (for example, the left and right sides of the fixing block 801 are inclined surfaces), and the fixing block 801 blocks the corresponding hole 602. Figure 5

[0034] As shown in Figure 2 and Figure 7 , the outer side of each core 1 is fixedly connected with a fixed frame 9, the fixed frame 9 is composed of two parts, the fixed frame 9 is made of elastic material, and the elastic coefficient of the fixed frame 9 is greater than the elastic coefficient of the filling layer 2 and the elastic coefficient of the elastic sheet 8. The outer edge of the cross section of the fixed frame 9 is a regular hexagon, the filling layer 2, the support 6, the elastic sheet 8 and the fixing block 801 are respectively in contact with the adjacent fixed frame 9, the fixed frame 9 is provided with a plurality of cavities 901 which are uniformly distributed, the outer side width of the cavity 901 is greater than the inner side width, which is used to improve the anti-extrusion capacity on the basis of reducing the weight.

[0035] ​Specific working principle: during the assembling cable operation, first install four fixed frames 9 outside four cores 1, then place four fixed frames 9 at four corners of the support 6, then place four elastic sheets 8 between adjacent two fixed frames 9, and wrap four filling layers 2 outside four fixed frames 9, and make the convex strip of the filling layer 2 clamped into the groove of the adjacent elastic sheet 8, so that the components of the cable are pre-connected, and then the winding of the braided layer 3 and the wrapping of the protective layer 4 can be carried out. The quick connection between the filling layer 2 and the elastic sheet 8 in the above assembling process improves the assembly efficiency of the cable.

[0036] Example 4: on the basis of example 3, as shown in Figure 2 and Figure 8 It also includes a plurality of evenly distributed fixed columns 10, the fixed columns 10 on the same cross section of the protective layer 4 are a group, the number of the group of fixed columns 10 is eight circumferentially equidistant fixed columns 10, the fixed columns 10 are embedded in adjacent filling layers 2, the outer end of each group of fixed columns 10 is conical, which facilitates the fixed columns 10 to penetrate the braided layer 3, the fixed columns 10 are inserted into the protective layer 4, and the fixed columns 10 are located directly below the protrusions 5, and the braided layer 3 is spirally interlaced.

[0037] Specific working principle: after the cable is assembled, when the cable is subjected to axial tensile force, the protective layer 4 is deformed (may be accompanied by circumferential contraction) under the action of tensile force, wherein the deformation of the protective layer 4 causes the braided layer 3 to deform by extruding the braided layer 3 through the fixed columns 10, and since the braided layer 3 is spirally interlaced, the braided layer 3 is circumferentially contracted by stretching, realizing uniform distribution of tensile stress on the whole cable and improving the tensile property and structural stability of the cable.

[0038] It should be noted that the above preferred embodiments are only for illustrating the technical concept and characteristics of the present application, and the purpose is to enable those skilled in the art to understand the content of the present application and implement it, and cannot limit the protection scope of the present application. Any equivalent changes or modifications made according to the spirit and essence of the present application shall be covered within the protection scope of the present application.

Claims

1. A kind of anti-seismic corrosion-resistant polyethylene new energy cable, it is characterized by, The utility model provides a kind of cable, including four wire cores (1), the outer surface of the wire core (1) is provided with polyethylene insulating layer, four wire cores (1) are circumferentially equidistant distribution, four wire cores (1) are wrapped with circumferentially equidistant distribution four filling layers (2), the outer side of four filling layers (2) is wrapped with braiding layer (3), the outer side of braiding layer (3) is fixed with protective layer (4), and the protective layer (4) is composed of 85% high-density polyethylene matrix and 15% perfluoropolyether elastomer; The outer side of the protective layer (4) is fixed with a plurality of protrusions (5) uniformly distributed, the protrusions (5) are semispherical, and the tangent between two adjacent protrusions (5) in the circumferential direction is located on the outer side of the protective layer (4), and the protrusions (5) are elastic materials, and the elastic coefficient of the protrusions (5) is less than the elastic coefficient of the protective layer (4); The support member (6) is of elastic material, and the support member (6) is provided with a plurality of recesses (601) uniformly distributed, and the recesses (601) are used to provide the bending range of the support member (6); Further comprising four elastic sheets (8), four elastic sheets (8) are respectively arranged between two adjacent wire cores (1), and the elastic sheet (8) is in contact with the support member (6) and the adjacent filling layer (2), the elastic sheet (8) is provided with a clamping groove, the filling layer (2) is provided with a protruding strip, and the protruding strips of two adjacent filling layers (2) are used to be installed in the clamping groove of the corresponding elastic sheet (8), the inner side surface of the four elastic sheets (8) is on a circular track, and the circular track is the torsion track of the outer edge of the support member (6); The elastic sheet (8) is fixed with a plurality of fixing blocks (801) uniformly distributed, and the fixing blocks (801) are located in the corresponding recesses (601).

2. The anti-seismic and corrosion-resistant polyethylene new energy cable according to claim 1, characterized in that, The cross section of the support member (6) is cruciform, and the four wire cores (1) are respectively located at the four corners of the support member (6), and the separation of the support member (6) to the four wire cores (1) is used to ensure the spacing between two adjacent wire cores (1).

3. The anti-seismic and corrosion-resistant polyethylene new energy cable according to claim 1, characterized in that, The middle part of the support member (6) is provided with a through hole, and a plurality of hole holes (602) are arranged on the support member (6) at the recesses (601) and are circumferentially equidistantly distributed, and the hole holes (602) are used to provide the activity space for the circumferential torsion of the support member (6).

4. The anti-seismic and corrosion-resistant polyethylene new energy cable according to claim 3, characterized in that, The through hole of the support member (6) is provided with a reinforcing rib (7), and the material of the reinforcing rib (7) is shape memory polymer, which is used to assist the support member (6) to keep the state after deformation.

5. The anti-seismic and corrosion-resistant polyethylene new energy cable according to claim 4, characterized in that, There is a gap between the support member (6) and the reinforcing rib (7), a plurality of elastic rings (701) are fixed in the through hole of the support member (6) and are uniformly distributed, the inner side surface of the elastic ring (701) is fixed with the reinforcing rib (7), and a plurality of elastic rings (701) and a plurality of recesses (601) are alternately distributed.

6. The anti-seismic and corrosion-resistant polyethylene new energy cable according to claim 1, characterized in that, The outer side of each said core (1) is fixedly connected with a fixed frame (9), the fixed frame (9) is composed of two parts, the outer edge of the cross section of the fixed frame (9) is a regular hexagon, the filling layer (2), the support (6), the elastic sheet (8) and the fixed block (801) are respectively in contact with the adjacent fixed frame (9), the fixed frame (9) is provided with a plurality of cavities (901) uniformly distributed.

7. The anti-seismic and corrosion-resistant polyethylene new energy cable according to claim 1, characterized in that, It also includes a plurality of fixed columns (10) uniformly distributed, the fixed column (10) is embedded in the adjacent filling layer (2), the fixed column (10) is conical at one end outside the filling layer (2), the fixed column (10) penetrates the woven layer (3) and is inserted into the protection layer (4), the woven layer (3) is spirally crossed and woven.

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