Power cable easy to assemble

Abstract

The invention belongs to the technical field of electric power, and discloses an easy-to-assemble power cable which is provided with a cable core and an outer sheath, and the cable core is composed of four power transmission units; each power transmission unit is composed of four first insulated wires and a first insulator, the first insulator is composed of a first insulator body and a second insulator body, the second insulator body is located below one end of the first insulator body, the three first insulated wires are located in the first insulator body, and the fourth first insulated wire is located in the second insulator body; in the cable core, the lower surface of the first insulator body of the next power transmission unit clings to the right surface of the first insulator body of the previous power transmission unit, and the left surface of the second insulator body of the next power transmission unit clings to the lower surface of the second insulator body of the previous power transmission unit. The upper surfaces of the first insulator bodies of all the power transmission units are spliced into a square. The beneficial effects are that no twisting equipment is needed, and defects caused by twisting cannot be generated; and the device is suitable for laying rectangular pipelines, high in space utilization rate and convenient to assemble.

Description

Technical Field

[0001] The invention belongs to the technical field of electric power, and in particular relates to an easily assembled power cable. Background Art

[0002] The cables in the prior art are usually formed by twisting multiple insulated wires with circular cross-sections to form a cable core, and then covering the cable core with a protective sheath. This type of cable has the following main defects: twisting causes the conductor to be twisted, and the electrical and mechanical properties to be reduced; it is not suitable for the laying of square cross-section pipes that are increasingly used, and the space utilization rate is low; it requires complex cable core molding equipment and is not easy to assemble.

[0003] CN104766663A discloses a three-phase high-current aircraft main feeder structure, which is composed of 7 rounded rectangular cables in total, wherein a single independent cable is the center line N, and the three phases A, B, and C are all double-strand cables laid together. The interior of a single rounded rectangular cable is formed by twisting and arranging multiple round conductors, ensuring that the rounded rectangular cable has good bending ability while reducing impedance and increasing current carrying capacity.

[0004] CN202584856U discloses a novel three-phase electric energy transmission flat mobile soft cable. It is composed of a tensile core, a conductor, an insulating layer, a wear-resistant layer, a neutral conductor layer, a wrapping layer, and an outer sheath. A reinforcing core is arranged in the center of the conductor, the cable cores are arranged in parallel in a straight line, a temperature measuring optical fiber assembly is arranged between the cable cores, and the cable is flat as a whole.

[0005] However, the above-mentioned prior art cannot solve the existing technical problems. Summary of the invention

[0006] To solve the above problems, the purpose of the present invention is to disclose an easily assembled power cable, which is achieved by adopting the following technical solutions.

[0007] The utility model discloses an easily assembled power cable, comprising a cable core and an outer sheath covering the cable core, wherein the cable core is composed of four identical transmission units; the characteristics are as follows: each transmission unit is composed of four first insulating wires and a first insulator, wherein the first insulating wire is composed of a first conductor and a first insulating layer, wherein the first insulating layer covers the first conductor, wherein the first insulator is composed of a first insulator body and a second insulator body, wherein the first insulator is an integrated structure, wherein the cross section of the first insulator body is a rectangle, wherein the cross section of the second insulator body is a rectangle, wherein the second insulator body is located below one end of the first insulator body, wherein three first insulating wires are arranged in a row in the first insulator body, and the fourth first insulating wire is located in the second insulator body; in the cable core, in a clockwise direction, the lower surface of the first insulator body of the rear transmission unit is in close contact with the right surface of the first insulator body of the front transmission unit, and the left surface of the second insulator body of the rear transmission unit is in close contact with the lower surface of the second insulator body of the front transmission unit, and the upper surfaces of the first insulator bodies of all the transmission units are assembled into a square.

[0008] An easily assembled power cable comprises a cable core and an outer sheath wrapped around the cable core, wherein the cable core is composed of two identical power transmission units and two identical power transmission components; the characteristics are as follows: each power transmission unit is composed of four first insulating wires and a first insulator, the first insulating wire is composed of a first conductor and a first insulating layer, the first insulating layer covers the first conductor, the first insulator is composed of a first insulator body and a second insulator body, the first insulator is an integrated structure, the cross section of the first insulator body is a rectangle, the cross section of the second insulator body is a rectangle, the second insulator body is located directly below the first insulator body, wherein three first insulating wires are arranged in a row in the first insulator body. The fourth first insulating wire is located in the second insulator; each transmission component is composed of four second insulating wires and a second insulator, the second insulating wire is composed of a second conductor and a second insulating layer, the second insulating layer covers the second conductor, the second insulator is composed of a first sub-insulator and a second sub-insulator, the second insulator is an integrated structure, the cross-section of the first sub-insulator is rectangular, the cross-section of the second sub-insulator is rectangular, the second sub-insulator is located directly below the first sub-insulator, three second insulating wires are distributed in the first sub-insulator in a row, and the fourth second insulating wire is located in the second sub-insulator; two transmission units are arranged opposite to each other, the second insulators of the two transmission units are opposite to each other and do not contact, two transmission components are arranged opposite to each other, the second sub-insulators of the two transmission components are opposite to each other and spliced, the second insulator of the upper transmission unit is embedded in the upper groove formed by the splicing of the second sub-insulators of the two transmission components, and the second insulator of the lower transmission unit is embedded in the lower groove formed by the splicing of the second sub-insulators of the two transmission components, and the cross-section of the cable core is rectangular.

[0009] The present application has the following major beneficial technical effects: no twisting equipment is required during production and defects caused by twisting will not occur; it is suitable for the laying of rectangular pipes, has high space utilization and is easy to assemble. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 This is a schematic diagram of the three-dimensional structure after peeling of a section of Example 1.

[0011] Figure 2 for Figure 1 Schematic diagram of the enlarged cross-sectional structure.

[0012] Figure 3 for Figure 1 Schematic diagram of the three-dimensional structure of a section of the power transmission unit used in the present invention after peeling.

[0013] Figure 4 for Figure 3 Schematic diagram of the enlarged cross-sectional structure.

[0014] Figure 5 This is a schematic diagram of the three-dimensional structure after peeling of a section of Example 2.

[0015] Figure 6 for Figure 5 Schematic diagram of the enlarged cross-sectional structure.

[0016] Figure 7 for Figure 5 Schematic diagram of the three-dimensional structure of a section of the power transmission unit used in the present invention after peeling.

[0017] Figure 8 for Figure 7 Schematic diagram of the enlarged cross-sectional structure.

[0018] Fig. 9 for Figure 5 Schematic diagram of the three-dimensional structure of a section of the power transmission component used in the process after peeling.

[0019] Fig.10 for Fig. 9 Schematic diagram of the enlarged cross-sectional structure. DETAILED DESCRIPTION

[0020] In order to enable those skilled in the art to better understand and implement this patent, the marks in the drawings are now described in detail in conjunction with the drawings in the specification.

[0021] In the figure: 1—transmission unit, 1a—transmission component, 2—outer sheath, 11—first insulating wire, 12—first insulator, 111—first conductor, 112—first insulating layer, 121—first insulator, 122—second insulator, 11a—second insulating wire, 12a—second insulator, 111a—second conductor, 112a—second insulating layer, 121a—first sub-insulator, 122a—second sub-insulator, L1—length of the first insulator, H1—width of the first insulator, L2—length of the second insulator, H2—width of the second insulator, L3—distance between one side of the second insulator in the width direction and the first insulator in the width direction, L1a—length of the first sub-insulator, H1a—width of the first insulator, L2a—length of the second sub-insulator, H2a—width of the second sub-insulator, L3a—distance between one side of the first sub-insulator in the width direction and the second sub-insulator in the width direction.

[0022] Implementation Example 1: Please see Figures 1 to 4 , an easily assembled power cable, comprising a cable core and an outer sheath 2 wrapped around the cable core, wherein the cable core is composed of four identical power transmission units 1; the characteristics are as follows: each power transmission unit 1 is composed of four first insulating wires 11 and a first insulator 12, the first insulating wire 11 is composed of a first conductor 111 and a first insulating layer 112, the first insulating layer 112 covers the first conductor 111, the first insulator 12 is composed of a first insulator body 121 and a second insulator body 122, the first insulator 12 is an integrated structure, the cross section of the first insulator body 121 is a rectangle, the cross section of the second insulator body 122 is a rectangle, and the cross section of the second insulator body 121 is a rectangle. The insulator 122 is located below one end of the first insulator 121, wherein three first insulating wires 11 are arranged in a row in the first insulator 121, and the fourth first insulating wire 11 is located in the second insulator 122; in the cable core, in a clockwise direction, the lower surface of the first insulator 121 of the rear transmission unit 1 is in close contact with the right surface of the first insulator 121 of the front transmission unit 1, and the left surface of the second insulator 122 of the rear transmission unit 1 is in close contact with the lower surface of the second insulator 122 of the front transmission unit 1, and the upper surfaces of the first insulators 121 of all the transmission units are assembled into a square.

[0023] The upper surface, lower surface, left surface and right surface are Figure 4 The illustration in is used as an example.

[0024] In this embodiment, L1=3 times of L2, H1=H2=L2.

[0025] Implementation Example 2: Please see Figure 5 and Fig.10 ,refer to Figures 1 to 4, an easily assembled power cable, comprising a cable core and an outer sheath 2 wrapped around the cable core, wherein the cable core is composed of two identical power transmission units 1 and two identical power transmission components 1a; characterized in that: each power transmission unit 1 is composed of four first insulating wires 11 and a first insulator 12, the first insulating wire 11 is composed of a first conductor 111 and a first insulating layer 112, the first insulating layer 112 covers the first conductor 111, the first insulator 12 is composed of a first insulator body 121 and a second insulator body 122, the first insulator 12 is an integrated structure, the cross section of the first insulator body 121 is a rectangle, the cross section of the second insulator body 122 is a rectangle, the second insulator body 122 is located directly below the first insulator body 121, wherein three first insulating wires 11 are arranged in a row in the first insulator body 121, the fourth first insulator body 121 is arranged in a row in the first insulator body 121, and the fourth first insulator body 122 is arranged in a row in the first insulator body 121. The wire 11 is located in the second insulator body 122; each transmission component 1a is composed of four second insulating wires 11a and a second insulator 12a, the second insulating wire 11a is composed of a second conductor 111a and a second insulating layer 112a, the second insulating layer 112a covers the second conductor 111a, the second insulator 12a is composed of a first sub-insulator 121a and a second sub-insulator 122a, the second insulator 12a is an integrated structure, the cross section of the first sub-insulator 121a is a rectangle, the cross section of the second sub-insulator 122a is a rectangle, the second sub-insulator 122a is located directly below the first sub-insulator 121a, three second insulating wires 11a are distributed in rows in the first sub-insulator 121a, and the fourth second insulating wire 11a is located in the second sub-insulator 122a; the two transmission units 1 are arranged opposite to each other, The second insulator bodies 122 of the two transmission units 1 are opposite to each other and do not contact each other, the two transmission components 1a are arranged opposite to each other, the second sub-insulators 122a of the two transmission components 1a are opposite to each other and spliced, the second insulator body 122 of the upper transmission unit 1 is embedded in the upper groove formed by the second sub-insulators 122a of the two transmission components 1a, and the second insulator body 122 of the lower transmission unit 1 is embedded in the lower groove formed by the second sub-insulators 122a of the two transmission components 1a. The cross-section of the cable core is rectangular.

[0026] In this embodiment, L1=3 times of L2, H1=L2, H2=0.75 times of H1, L3=L2; L1a=2 times of L2a, H1a=1 / 3 times of L1a, H2a=0.5 times of H1a, L3a=0.75 times of H1a.

[0027] In this embodiment, the thickness and width of the second insulator 12a of the power transmission component 1a and the first insulator 12 of the power transmission unit 1 are different, so the power transmission component 1a and the power transmission unit 1 can be easily distinguished by naked eyes; in addition, the cross-sectional area of ​​the first conductor in the second insulator body 122 is equal to or slightly smaller than the cross-sectional area of ​​the first conductor in the corresponding first insulator body 121; the cross-sectional area of ​​the second conductor in the second sub-insulator 122a is equal to or slightly smaller than the cross-sectional area of ​​the first conductor in the corresponding first sub-insulator 121a; when they are equal, they can be used as a three-phase four-wire system, and when they are slightly smaller, they can be used as a ground wire.

[0028] The above-mentioned easily assembled power cable is characterized in that the material of the first conductor 111 is copper or aluminum or copper alloy or aluminum alloy.

[0029] The above-mentioned easily assembled power cable is characterized in that the material of the second conductor 111a is copper or aluminum or copper alloy or aluminum alloy.

[0030] The above-mentioned easily assembled power cable is characterized in that the material of the first insulating layer 112 is plastic.

[0031] The above-mentioned easily assembled power cable is characterized in that the material of the second insulating layer 112a is plastic.

[0032] The above-mentioned easily assembled power cable is characterized in that the material of the first insulator body 121 is plastic.

[0033] The above-mentioned easily assembled power cable is characterized in that the material of the second insulator body 122 is plastic.

[0034] The above-mentioned easily assembled power cable is characterized in that the material of the first sub-insulator 121a is plastic.

[0035] The above-mentioned easily assembled power cable is characterized in that the material of the second sub-insulator 122a is plastic.

[0036] The above-mentioned easily assembled power cable is characterized in that the material of the outer sheath 2 is plastic, preferably flame-retardant or fire-proof plastic.

[0037] In the present application, the first embodiment forms a cable core with a square cross-section by interlocking four L-shaped transmission units 1. The shape of the outer sheath 2 matches the shape of the cable core and is also square, which is convenient for assembly and disassembly. No cable twisting equipment is required, and the four first insulated wires 11 can be used as a three-phase four-wire system or a three-phase line with a ground wire or two two-phase lines, so it is flexible to use. When a three-phase line with a ground wire is used, it is preferred that the first insulated wire 11 in the second insulator body 122 is used as the ground wire. Compared with a horizontal structure, that is, there is only one first insulator body 121 with four straight transmission units inside, the ground wire is easier to distinguish, and the transmission units are interlocked to form a cable core with a more stable structure.

[0038] In the present application, the first embodiment also solves the technical problems existing in the prior art by interlocking two L-shaped power transmission units 1 and two power transmission components 1a, but the difference is that they cannot be locked with each other.

[0039] In the present application, the unitary concept is a first insulator 12 composed of a first insulator body 121 and a second insulator body 122; or a second insulator 12a composed of a first sub-insulator 121a and a second sub-insulator 122a; and the second insulator body 122 or the second sub-insulator 122a protrudes downward from the first insulator 12 or the second insulator 12a, but the positions of the two are different, one is below one end of the first insulator body 121, and the other is directly below the first insulator body 121.

[0040] The clockwise described in this application is relative, because of the two ends of a cable, one end is clockwise when viewed from the direction, while the other end is counterclockwise when viewed from the direction.

[0041] This application solves all the problems existing in the prior art.

[0042] The present application has the following major beneficial technical effects: no twisting equipment is required during production and defects caused by twisting will not occur; it is suitable for the laying of rectangular pipes, has high space utilization and is easy to assemble.

[0043] The above embodiments are only preferred technical solutions of the present invention and should not be regarded as limiting the present invention. The protection scope of the present invention shall be the technical solutions recorded in the claims, including the equivalent replacement solutions of the technical features in the technical solutions recorded in the claims. That is, equivalent replacement improvements within this scope are also within the protection scope of the present invention.

Claims

1. An easily assembled power cable, comprising a cable core and an outer sheath covering the cable core, wherein the cable core is composed of four identical power transmission units; characterized in that: Each transmission unit is composed of four first insulating wires and a first insulator. The first insulating wire is composed of a first conductor and a first insulating layer. The first insulating layer covers the first conductor. The first insulator is composed of a first insulator body and a second insulator body. The first insulator is an integrated structure. The cross-section of the first insulator body is a rectangle. The cross-section of the second insulator body is a rectangle. The second insulator body is located below one end of the first insulator body. Three first insulating wires are distributed in the first insulator body in a row, and the fourth first insulating wire is located in the second insulator body. In the cable core, in a clockwise direction, the lower surface of the first insulator body of the rear transmission unit is close to the right surface of the first insulator body of the front transmission unit, and the left surface of the second insulator body of the rear transmission unit is close to the lower surface of the second insulator body of the front transmission unit. The upper surfaces of the first insulator bodies of all transmission units are assembled into a square.

2. An easily assembled power cable, comprising a cable core and an outer sheath covering the cable core, wherein the cable core is composed of two identical power transmission units and two identical power transmission components; characterized in that: Each transmission unit is composed of four first insulating wires and a first insulator. The first insulating wire is composed of a first conductor and a first insulating layer. The first insulating layer covers the first conductor. The first insulator is composed of a first insulator body and a second insulator body. The first insulator is an integrated structure. The cross section of the first insulator body is rectangular. The cross section of the second insulator body is rectangular. The second insulator body is located directly below the first insulator body. Three first insulating wires are arranged in rows in the first insulator body, and the fourth first insulating wire is located in the second insulator body; each transmission component is composed of four second insulating wires and a second insulator. The second insulating wire is composed of a second conductor and a second insulating layer. The second insulating layer covers the second conductor. The second insulator is composed of a first sub-insulator and a second sub-insulator. The second insulator is an integrated structure. The cross section of the first sub-insulator is rectangular. The cross section of the second sub-insulator is rectangular. The second sub-insulator is located directly below the first sub-insulator. Three second insulating wires are arranged in rows in the first sub-insulator body, and the fourth second insulating wire is located in the second sub-insulator body; the two transmission units are arranged opposite to each other. The second insulator bodies of the two transmission units are opposite to each other and do not touch each other, the two transmission components are arranged opposite to each other, the second sub-insulators of the two transmission components are opposite to each other and spliced ​​together, the second insulator body of the upper transmission unit is embedded in the upper groove formed by the splicing of the second sub-insulators of the two transmission components, and the second insulator body of the lower transmission unit is embedded in the lower groove formed by the splicing of the second sub-insulators of the two transmission components, and the cross-section of the cable core is rectangular.

3. An easily assembled power cable according to claim 2, characterized in that: The material of the second conductor is copper or aluminum or a copper alloy or an aluminum alloy.

4. The easily assembled power cable according to claim 2, characterized in that: The material of the second insulating layer is plastic.

5. The easily assembled power cable according to claim 2, characterized in that: The material of the first sub-insulator is plastic.

6. The easily assembled power cable according to claim 2, characterized in that: The material of the second sub-insulator is plastic.

7. An easily assembled power cable according to claim 1 or claim 2, characterized in that: The material of the first conductor is copper or aluminum or a copper alloy or an aluminum alloy.

8. An easily assembled power cable according to claim 1 or claim 2, wherein the material of the first insulating layer is plastic.

9. The easily assembled power cable according to claim 1 or claim 2, wherein the material of the first insulator body is plastic; the material of the second insulator body is plastic.

10. An easily assembled power cable according to claim 1 or claim 2, wherein the material of the outer sheath is plastic.

Images