Stretch-resistant and vibration-damping power cable

Abstract

The invention relates to the technical field of power cables, in particular to a tensile vibration reduction type power cable. Comprising an outer protective layer; the winding layer is arranged in the outer protective layer in a winding manner; the armor layer is arranged in the winding layer; the filling layer is arranged in the armor layer; the plurality of wire groups are distributed in the circumferential direction and are arranged in the filling layer, and the wire groups are bent; the plurality of groups of supporting sheets are arranged in the filling layer at intervals; and the multiple stretching rods are all arranged in the filling layer, and the stretching rods are fixedly connected with elastic rods which are distributed in the circumferential direction and all located in the filling layer. According to the invention, the elastic rod is driven by the stretching rod to deform, and after the cable is stretched, the deformation of the elastic rod causes the synchronous deformation of the rubber filling layer, so that the bent wire group and the internal structure thereof are gradually straightened, and when the outer protection layer is stretched, the wire group and the internal structure thereof are not affected by a tensile force, thereby improving the tensile capability of the conductive wire.

Description

Technical Field

[0001] The present invention relates to the technical field of power cables, and in particular to a tensile-resistant and vibration-reducing power cable. Background Art

[0002] Tensile-resistant cable is a type of cable developed for specific application environments. It is designed to cope with the tensile stress that the cable may encounter during laying and use. In some special environments, such as oceans, mines, tunnels, etc., cables need to withstand greater mechanical stress. Tensile-resistant cables can provide higher mechanical strength in these environments to ensure the safety and reliability of the cables. In order to improve the tensile strength of the conductive wires inside the existing cables, the cables are generally set to a twisted structure. During the use of the cables, the cables are subjected to external tension or local bending for a long time. Once the tension on the cable exceeds the tension it can withstand, the twisted structure inside the cable will be tensilely deformed, and the twisted structure of the cable will be difficult to reset after deformation. This will cause gaps between the wires originally twisted together in the cable, thereby affecting the tensile strength of the cable, causing the tensile strength of the cable to gradually decrease during use, thereby affecting the normal use of the cable system.

[0003] Therefore, there is an urgent need to develop a tensile-resistant and vibration-reducing power cable. Summary of the invention

[0004] In order to overcome the shortcomings of the above background technology, the present invention provides a tensile-resistant and vibration-reducing power cable.

[0005] The technical solution of the present invention is: a tensile-resistant and vibration-reducing power cable, comprising: Outer sheath; A winding layer, wound inside the outer protective layer; An armor layer, arranged in the winding layer, to improve the strength of the cable; A filling layer is arranged in the armor layer and is used to make the cable shape uniform and round. The filling layer is made of rubber and is used for physical isolation. A plurality of wire groups are circumferentially distributed and arranged in the filling layer, and the wire group is in a curved shape; Support sheets, comprising a plurality of groups, are arranged at intervals in the filling layer, each group of support sheets is evenly distributed in the circumferential direction, and the support sheets are located between two adjacent groups of the conductors, so as to be used for even force when the cable is deformed; There are several flexible rods, all of which are arranged in the filling layer, one side of the support sheet is fixedly connected to the adjacent flexible rod, and the other side of the support sheet is limitedly matched with the armor layer; There are several stretching rods, all of which are arranged in the filling layer. The flexible rod is fixedly connected to the adjacent stretching rod, and several flexible rods and several stretching rods are distributed alternately. The stretching rod is fixedly connected to elastic rods which are distributed circumferentially and are all located in the filling layer, and the elastic rods are extrusion-fitted with the filling layer.

[0006] In addition, it is particularly preferred that the wire group includes: An insulating shielding layer is arranged in the filling layer, and the contact surface between the insulating shielding layer and the filling layer is a smooth surface; An insulating layer, disposed in the insulating shielding layer; A plurality of conductive wires are twisted together and arranged in the insulating layer.

[0007] In addition, it is particularly preferred that it further comprises: The steel shrapnel has several groups, each group is evenly distributed in the circumferential direction and the number is the same as the number of the wire groups, all of which are arranged in the winding layer, the steel shrapnel is fixedly connected to the armor layer, and the cross-section of the steel shrapnel is arc-shaped.

[0008] In addition, it is particularly preferred that the cross-section of the elastic rod is arc-shaped, the length of the horizontal projection of the steel spring sheet is the same as the length of the horizontal projection of the adjacent elastic rod, and the horizontal projection of the steel spring sheet is aligned with the horizontal projection of the adjacent elastic rod, so as to provide storage space for the stretching margin of the insulating shielding layer between the steel spring sheet and the adjacent elastic rod.

[0009] In addition, it is particularly preferred that a section of the insulating shielding layer aligned with the elastic rod is curved, the shortest distance from each location of the insulating shielding layer to the winding layer is variable X, the winding thickness of the winding layer at each location is variable Y, and X is positively correlated with Y.

[0010] In addition, it is particularly preferred that it further comprises: The limit blocks have several groups, each group is evenly distributed in the circumferential direction and is arranged on the filling layer. The limit blocks are located between two adjacent steel springs. The limit blocks are squeezed and matched with the adjacent steel springs. The width of the limit blocks gradually narrows from the winding layer to the stretching rod, and is used to seal and wrap the filling layer.

[0011] In addition, it is particularly preferred that it further comprises: The extrusion blocks have several groups, each group is evenly distributed circumferentially, the number of each group is the same as the number of the wire groups, and are arranged on the filling layer. The extrusion blocks are located between adjacent steel springs and adjacent insulating shielding layers, and the steel springs are extruded and matched with adjacent extrusion blocks.

[0012] In addition, it is particularly preferred that it further comprises: The top plates have several groups and are fixedly connected to the adjacent flexible rods. The top plates in each group are stacked in an alternating manner, and the top plates are extrusion-matched with the filling layers.

[0013] Furthermore, it is particularly preferred that the supporting sheet is an arc-shaped elastic sheet.

[0014] In addition, it is particularly preferred that the top plate is an arc-shaped elastic sheet, and the back side of each group of top plates is fixedly connected to two adjacent support sheets.

[0015] The beneficial effects produced by the above technical solution are as follows: 1. The present invention drives the elastic rod to deform through the stretching rod. After the cable is stretched, the deformation of the elastic rod causes the filling layer of the rubber material to deform synchronously, so that the bent wire group and its internal structure are gradually straightened, so that when the outer sheath is pulled, the wire group and its internal structure are not affected by the tension, so as to increase the tensile strength of the conductive wire, and use the filling layer to physically isolate the wire group, reduce the vibration force directly transmitted to the wire group, and reduce the influence of vibration on the wire group; 2. The deformation of the cable is buffered by the deformation of the support sheet, and the supporting strength of the filling layer is increased to prevent the compression deformation of the filling layer from causing the cable body to deform. The cable deformation causes it to be no longer round, thereby affecting the tensile strength of the cable; 3. The filling layer is squeezed by the top plate so that the filling layer between the two top plates and the adjacent insulating shielding layer is compressed and deformed to prevent the insulating shielding layer from bending and deforming and causing a gap between the filling layer and the insulating shielding layer, thereby affecting the stability of the insulating shielding layer and the normal use of the cable. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention; Figure 2 A three-dimensional structural cross-sectional view of the insulating shielding layer and the insulating layer of the present invention; Figure 3 It is a schematic diagram of the three-dimensional structure of the stretching rod and the elastic rod of the present invention; Figure 4 It is a schematic diagram of the three-dimensional structure of the support sheet of the present invention; Figure 5 It is a schematic diagram of the three-dimensional structure of the insulating shielding layer of the present invention; Figure 6 It is a schematic diagram of the three-dimensional structure of the top plate of the present invention; Figure 7 It is a three-dimensional structural cross-sectional view of the flexible rod and the top plate of the present invention.

[0017] The markings in the accompanying drawings are as follows: 1-outer protective layer, 2-winding layer, 3-armor layer, 4-filling layer, 5-wire group, 501-insulating shielding layer, 502-insulating layer, 503-conductive wire, 6-support plate, 7-flexible rod, 8-tension rod, 9-elastic rod, 10-steel spring sheet, 11-limiting block, 12-extrusion block, 13-top plate. DETAILED DESCRIPTION

[0018] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0019] like Figure 1-Figure 5As shown in the figure, it is an embodiment of the present invention, which proposes a tensile-resistant vibration-reducing power cable, comprising: an outer sheath 1, used to prevent moisture from entering the interior of the cable and provide electrical protection for the cable; a winding layer 2, which is wound inside the outer sheath 1, and the winding layer 2 is made of non-absorbent fiber material. By filling the gap inside the outer sheath 1, the cross-section of the entire cable is circular, so that the distance from each point of the material to the center of the cross-section is equal. When subjected to tension, the stress is more evenly distributed on the cross-section, thereby improving the tensile strength of the cable; an armor layer 3, which is made of steel and is arranged in the winding layer 2 to improve the strength of the cable; a filling layer 4, which is arranged in the armor layer 3, and is used to make the cable shape uniform and round, and the filling layer 4 is used to fill the gap inside the outer sheath 1. The filling layer 4 is made of rubber material and is used for physical isolation, reducing the vibration force directly transmitted to the inside of the cable and reducing the impact of vibration on the cable; the conductor group 5 has a plurality of circumferentially distributed conductors 501, an insulating layer 502 and a plurality of conductive wires 503, and the insulating shielding layer 501 and the insulating layer 502 are used to shield external electromagnetic interference to ensure the electrical stability of the conductive wire 503. The conductor group 5 is curved, and the insulating shielding layer 501 and its inner structure are slightly curved in the filling layer 4. When the filling layer 4 is stretched, the insulating shielding layer 501 and its inner structure are gradually straightened, so that when the filling layer 4 is initially stretched, the insulating shielding layer 501 and its inner structure are gradually straightened. 1 and its internal structure are not subjected to tension, so as to increase the tensile strength of the conductor group 5, the insulating shielding layer 501 is arranged in the filling layer 4, the insulating layer 502 is arranged in the insulating shielding layer 501, and a plurality of conductive wires 503 are twisted together and arranged in the insulating layer 502. Through the twisting form, each single wire disperses the stress when subjected to force, and avoids its breakage caused by strong stretching in a single direction, thereby improving the tensile strength of the cable as a whole; the support sheet 6 has a plurality of groups, which are arranged in the filling layer 4 at intervals, and each group of support sheets 6 is evenly distributed in the circumferential direction. The support sheet 6 is located between two adjacent insulating shielding layers 501, and is used for uniform force when the cable is deformed. When the outer sheath 1 is partially pulled due to the bending of the cable, the outer The sheath 1, the winding layer 2 and the armor layer 3 are pulled to produce lateral movement, the armor layer 3 drives all the support sheets 6 to move lateral, the support sheet 6 drives the filling layer 4 to move, and the contact surface between the insulating shielding layer 501 and the filling layer 4 is a smooth surface, which reduces the stretching speed of the insulating shielding layer 501, prevents the twisted structure of the conductive wire 503 from being deformed due to stretching, and improves the tensile strength of the cable; there are several flexible rods 7, all of which are arranged in the filling layer 4, one side of the support sheet 6 is fixedly connected to the adjacent flexible rod 7, and the other side of the support sheet 6 is limitedly matched with the armor layer 3, and a protrusion is arranged on the support sheet 6, which is stuck in the armor layer 3, and directly drives the support sheet 6 to move lateral when the armor layer 3 moves lateral;There are several stretching rods 8, which are made of flexible material and are all arranged in the filling layer 4. The flexible rods 7 are fixedly connected to the adjacent stretching rods 8, and the several flexible rods 7 are alternately distributed with the several stretching rods 8. The stretching rods 8 are fixedly connected with the elastic rods 9 which are distributed circumferentially and are all located in the filling layer 4. The elastic rods 9 are extruded and matched with the filling layer 4. The flexible rods 7 are used to drive the adjacent stretching rods 8 to stretch, and the stretching rods 8 are used to drive the adjacent circumferentially distributed elastic rods 9 to stretch and deform. When the armor layer 3 drives all the support sheets 6 to move, the support sheets 6 drive the flexible rods 7 to move, the flexible rods 7 drive the stretching rods 8 to stretch and deform, and the elastic rods 9 are deformed. When the elastic rods 9 are stretched and deformed, the filling layer 4 made of rubber material rebounds and deforms, and the curved insulating shielding layer 501 and its internal structure are gradually straightened, which is used to make the stretching rods 8 stretch preferentially when the outer sheath 1 is stretched. ;

[0020] like Figure 2-Figure 5 As shown, further, it also includes: steel spring pieces 10, which have several groups, each group is evenly distributed in the circumferential direction and the number is the same as the number of wire groups 5, and they are all arranged in the winding layer 2. The steel spring pieces 10 are fixedly connected to the armor layer 3. The cross-section of the steel spring pieces 10 is arc-shaped, which is used to control the state of the insulating shielding layer 501. In the initial state, when the cable is not stretched, the elastic force of the steel spring piece 10 is less than the elastic force of the adjacent elastic rod 9, so that the insulating shielding layer 501 remains bent, and the steel spring piece 10 is in a force storage state. When the elastic rod 9 is stretched and deformed, the filling layer 4 of the rubber material rebounds and deforms. The steel spring piece 10 releases the stored force and squeezes the adjacent insulating shielding layer 501 through the filling layer 4 to move, converting the tension of the cable into pressure to straighten the insulating shielding layer 501 to enhance the tensile strength of the cable. The cross-section of the elastic rod 9 is arc-shaped. The length of the horizontal projection of the sheet 10 is the same as the length of the horizontal projection of the adjacent elastic rod 9, and the horizontal projection of the steel spring sheet 10 is aligned with the horizontal projection of the adjacent elastic rod 9, which is used to provide storage space for the stretching margin of the insulating shielding layer 501 between the steel spring sheet 10 and the adjacent elastic rod 9. A section of the insulating shielding layer 501 aligned with the elastic rod 9 is curved, and the shortest distance between each point of the insulating shielding layer 501 and the winding layer 2 is a variable X, and the winding thickness of the winding layer 2 at each point is a variable Y. X is positively correlated with Y, so that the winding thickness of the winding layer 2 at each point changes according to the bending degree of the insulating shielding layer 501, so as to ensure that the outer side surface of the winding layer 2 is evenly rounded, so that the distance from each point on the same layer of the cable to the center of the cross section is equal. When subjected to tension, the stress is more evenly distributed on the cross section, thereby improving the tensile strength of the cable.

[0021] like Figure 3-Figure 5As shown, further, it also includes: a limit block 11, which has several groups, each group is evenly distributed circumferentially, and is arranged on the filling layer 4. The limit block 11 is located between two adjacent steel shrapnel 10, and the limit block 11 is squeezed and matched with the adjacent steel shrapnel 10. The width of the limit block 11 gradually narrows from the winding layer 2 to the stretching rod 8, which is used to seal and wrap the filling layer 4. Both sides of the limit block 11 are provided with inclined surfaces that fit the adjacent steel shrapnel 10. When the steel shrapnel 10 moves toward the stretching rod 8, the steel shrapnel 10 moves along the inclined surfaces of the two adjacent limit blocks 11 to maintain the seal between the limit block 11 and the adjacent steel shrapnel 10 to ensure that moisture cannot penetrate into the filling layer 4.

[0022] like Figure 3-Figure 5 As shown, further, it also includes: an extrusion block 12, the extrusion block 12 is made of a flexible material, has a plurality of groups, each group is evenly distributed in the circumferential direction, the number of each group is the same as the number of the wire group 5, and is arranged on the filling layer 4, the extrusion block 12 is located between the adjacent steel spring piece 10 and the adjacent insulating shielding layer 501, the steel spring piece 10 is extruded and matched with the adjacent extrusion block 12, and is used to adjust the state of the wire group 5, when the steel spring piece 10 rebounds and deforms, the steel spring piece 10 squeezes the filling layer 4 through the adjacent extrusion block 12, so that the adjacent insulating shielding layer 501 is compressed and deformed, and the force generated by the deformation of the steel spring piece 10 is concentrated on the adjacent insulating shielding layer 501 through the extrusion block 12, so as to ensure that the insulating shielding layer 501 is stably deformed and straightened.

[0023] like Figure 4-Figure 7 As shown, further, it also includes: a top plate 13, which has several groups, fixed on adjacent flexible rods 7, each group of top plates 13 is staggered and stacked, the top plate 13 is squeezed and matched with the filling layer 4, the support sheet 6 is an arc-shaped elastic sheet to adapt to the bending of the cable as a whole, the top plate 13 is an arc-shaped elastic sheet, and the back side of each group of top plates 13 is fixed to two adjacent support sheets 6, which is used to control the top plate 13 to open, when the cable line as a whole is bent, the flexible rod 7 is bent and drives a group of top plates 13 located outside the bending place to open, and when the cable line as a whole is bent, the two support sheets 6 located outside the bending place are bent synchronously, and the two support sheets 6 are bent and squeeze the adjacent top plates 13 to open. Open, the top plate 13 squeezes the filling layer 4, so that the filling layer 4 located between the two top plates 13 and the adjacent insulating shielding layer 501 is compressed, and the filling layer 4 is deformed, thereby preventing the insulating shielding layer 501 from bending and deforming and generating a gap between the filling layer 4, thereby affecting the stability of the insulating shielding layer 501 and the normal use of the cable. When the cable is bent or stepped on, the outer sheath 1 squeezes the armor layer 3 through the winding layer 2, and the armor layer 3 squeezes the supporting sheet 6, so that the supporting sheet 6 is gradually bent, which buffers the deformation of the cable and increases the supporting strength of the filling layer 4, thereby preventing the filling layer 4 from being compressed and deformed, causing the cable body to be deformed, and the cable deformation causes it to be rounded, thereby affecting the tensile strength of the cable.

[0024] In summary, the invention includes but is not limited to the above embodiments. Any equivalent substitution or partial improvement made under the spirit and principle of the invention shall be deemed to be within the protection scope of the invention.

Claims

1. A tensile and vibration-reducing power cable, characterized in that: include: Outer sheath (1); A winding layer (2) wound inside the outer protective layer (1); An armor layer (3) is arranged inside the winding layer (2) to increase the strength of the cable; A filling layer (4) is arranged in the armor layer (3) and is used to make the cable shape uniform and round; the filling layer (4) is made of rubber material and is used for physical isolation; A plurality of wire groups (5) distributed in a circumferential direction and arranged in the filling layer (4); the wire group (5) is in a curved shape; The support sheets (6) have a plurality of groups and are arranged at intervals in the filling layer (4), each group of the support sheets (6) being evenly distributed in the circumferential direction, and the support sheets (6) are located between two adjacent groups of the conductors (5) so as to ensure uniform force when the cable is deformed; A plurality of flexible rods (7) are provided, all of which are arranged in the filling layer (4); one side of the support sheet (6) is fixedly connected to an adjacent flexible rod (7); and the other side of the support sheet (6) is limitedly matched with the armor layer (3); There are a plurality of stretching rods (8), all of which are arranged in the filling layer (4); the flexible rod (7) is fixedly connected to the adjacent stretching rod (8), and a plurality of the flexible rods (7) and a plurality of the stretching rods (8) are distributed alternately; the stretching rod (8) is fixedly connected to elastic rods (9) which are distributed circumferentially and are all located in the filling layer (4); the elastic rods (9) are extrusion-fitted with the filling layer (4).

2. The tensile-resistant and vibration-reducing power cable according to claim 1, characterized in that: The wire group (5) comprises: An insulating shielding layer (501) is arranged in the filling layer (4), and a contact surface between the insulating shielding layer (501) and the filling layer (4) is a smooth surface; An insulating layer (502) is arranged inside the insulating shielding layer (501); A plurality of conductive wires (503) are twisted together and arranged in the insulating layer (502).

3. The tensile-resistant and vibration-damping power cable according to claim 2, characterized in that: Also includes: The steel spring pieces (10) have a plurality of groups, each group being evenly distributed in the circumferential direction and having the same number as the wire group (5), and are all arranged in the winding layer (2). The steel spring pieces (10) are fixedly connected to the armor layer (3), and the cross-section of the steel spring pieces (10) is arc-shaped.

4. The tensile-resistant and vibration-reducing power cable according to claim 3, characterized in that: The cross section of the elastic rod (9) is arc-shaped, the length of the horizontal projection of the steel spring sheet (10) is the same as the length of the horizontal projection of the adjacent elastic rod (9), and the horizontal projection of the steel spring sheet (10) is aligned with the horizontal projection of the adjacent elastic rod (9), so as to provide storage space for the stretch margin of the insulating shielding layer (501) between the steel spring sheet (10) and the adjacent elastic rod (9).

5. The tensile-resistant and vibration-reducing power cable according to claim 4, characterized in that: A section of the insulating shielding layer (501) aligned with the elastic rod (9) is curved, the shortest distance between each location of the insulating shielding layer (501) and the winding layer (2) is a variable X, the winding thickness of the winding layer (2) at each location is a variable Y, and X is positively correlated with Y.

6. The tensile-resistant and vibration-damping power cable according to claim 5, characterized in that: Also includes: The limit blocks (11) have a plurality of groups, each group being evenly distributed in the circumferential direction and arranged on the filling layer (4). The limit blocks (11) are located between two adjacent steel spring sheets (10). The limit blocks (11) are squeezed and matched with the adjacent steel spring sheets (10). The width of the limit blocks (11) gradually narrows from the winding layer (2) to the stretching rod (8), and is used to seal and wrap the filling layer (4).

7. The tensile-resistant and vibration-damping power cable according to claim 6, characterized in that: Also includes: The extrusion blocks (12) have a plurality of groups, each group being evenly distributed in the circumferential direction, the number of each group being the same as the number of the wire groups (5), and are arranged on the filling layer (4), the extrusion blocks (12) being located between adjacent steel spring sheets (10) and adjacent insulating shielding layers (501), and the steel spring sheets (10) are extruded and matched with adjacent extrusion blocks (12).

8. The tensile-resistant and vibration-reducing power cable according to claim 7, characterized in that: Also includes: The top plates (13) have a plurality of groups fixedly connected to adjacent flexible rods (7), each group of the top plates (13) being arranged in a staggered stack, and the top plates (13) are pressed and matched with the filling layers (4).

9. The tensile-resistant and vibration-reducing power cable according to claim 8, characterized in that: The supporting sheet (6) is an arc-shaped elastic sheet.

10. The tensile-resistant and vibration-reducing power cable according to claim 9, characterized in that: The top plates (13) are arc-shaped elastic plates, and the back sides of each group of top plates (13) are fixedly connected to two adjacent support plates (6).

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