An easily assembled power cable

Abstract

The present invention belongs to the field of electric power technology and discloses an easily assembled power cable, which has a cable core and an outer sheath. 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. Three first insulated wires are inside the first insulator body, and the fourth first insulated wire is inside the second insulator body; in the cable core, the lower surface of the first insulator body of the latter power transmission unit closely adheres 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 latter power transmission unit closely adheres 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 power transmission units are joined together to form a square. Beneficial effects: No stranding equipment is required, and defects caused by stranding will not occur; it can be suitable for laying in rectangular pipelines, has a high space utilization rate, and is convenient for assembly.

Description

Technical Field

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

[0002] For the cables in the prior art, generally, multiple insulated wires with circular cross-sections are stranded to form a cable core, and then a protective sheath is coated outside the cable core. Such cables mainly have the following defects: stranding causes conductor distortion, resulting in a decline in electrical and mechanical properties; they are not suitable for the laying of square-section pipes that are increasingly used, and the space utilization rate is low; complex cable core forming equipment is required, and it is not convenient for assembly.

[0003] CN104766663A discloses a three-phase large-current aircraft main feeder structure, which is composed of 7 round-corner rectangular cables in total. Among them, a single-strand independent cable is the neutral line N, and the three phases A, B, and C are all double-strand cables laid together. Inside a single round-corner rectangular cable, multiple strands of circular conductors are stranded and arranged, ensuring that the round-corner rectangular cable has better bending ability while reducing impedance and increasing current-carrying capacity.

[0004] CN202584856U discloses a new type of three-phase electric energy transmission flat moving flexible cable, which 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 protective layer. A strengthening core is provided in the center of the conductor, the cable cores are arranged in parallel at equal intervals in a straight line, a temperature measurement optical fiber combination is arranged between the cable cores, and the whole cable is flat.

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

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

[0007] An easily assembled power cable, having a cable core and an outer sheath covering the cable core, the cable core being composed of four identical power transmission units; characterized in that: each power transmission unit is composed of four first insulated wires and a first insulator, the first insulated wire is composed of a first conductor and a first insulating layer, the first insulating layer covering the first conductor, the first insulator is composed of a first insulator body and a second insulator body, the first insulator is an integral 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 below one end of the first insulator body, and three of the first insulated wires are arranged in a row in the first insulator body, and the fourth first insulated wire is located in the second insulator body; in the cable core, in the clockwise direction, the lower surface of the first insulator body of the latter power transmission unit is closely attached to the right surface of the first insulator body of the previous power transmission unit, the left surface of the second insulator body of the latter power transmission unit is closely attached to the lower surface of the second insulator body of the previous power transmission unit, and the upper surfaces of the first insulator bodies of all power transmission units are joined together to form a square.

[0008] An easily assembled power cable, having a cable core and an outer sheath covering the cable core, the cable core being composed of two identical power transmission units and two identical power transmission components; characterized in that: each power transmission unit is composed of four first insulated wires and a first insulator, the first insulated wire is composed of a first conductor and a first insulating layer, the first insulating layer covering the first conductor, the first insulator is composed of a first insulator body and a second insulator body, the first insulator is an integral 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, and three of the first insulated wires are arranged in a row in the first insulator body, and the fourth first insulated wire is located in the second insulator body; each power transmission component is composed of four second insulated wires and a second insulator, the second insulated wire is composed of a second conductor and a second insulating layer, the second insulating layer covering the second conductor, the second insulator is composed of a first sub-insulator body and a second sub-insulator body, the second insulator is an integral structure, the cross-section of the first sub-insulator body is rectangular, the cross-section of the second sub-insulator body is rectangular, the second sub-insulator body is located directly below the first sub-insulator body, and three of the second insulated wires are arranged in a row in the first sub-insulator body, and the fourth second insulated wire is located in the second sub-insulator body; the two power transmission units are arranged oppositely, the second insulator bodies of the two power transmission units are opposite and do not touch, the two power transmission components are arranged oppositely, the second sub-insulator bodies of the two power transmission components are opposite and joined together, the second insulator body of the upper power transmission unit is embedded in the upper groove formed by the joining of the second sub-insulator bodies of the two power transmission components, and the second insulator body of the lower power transmission unit is embedded in the lower groove formed by the joining of the second sub-insulator bodies of the two power transmission components, and the cross-section of the cable core is rectangular.

[0009] This application has the following main beneficial technical effects: No stranding equipment is required during production, and defects caused by stranding will not occur; it is suitable for laying in rectangular pipelines, has high space utilization, and is convenient for assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a three-dimensional structural schematic diagram after stripping for a section of Example 1.

[0011] Figure 2 For Figure 1 It is a schematic cross-sectional structure diagram after magnification.

[0012] Figure 3 For Figure 1 It is a three-dimensional structural schematic diagram after stripping for a section of the power transmission unit used in

[0013] Figure 4 For Figure 3 It is a schematic cross-sectional structure diagram after magnification.

[0014] Figure 5 It is a three-dimensional structural schematic diagram after stripping for a section of Example 2.

[0015] Figure 6 For Figure 5 It is a schematic cross-sectional structure diagram after magnification.

[0016] Figure 7 For Figure 5 It is a three-dimensional structural schematic diagram after stripping for a section of the power transmission unit used in

[0017] Figure 8 For Figure 7 It is a schematic cross-sectional structure diagram after magnification.

[0018] Figure 9 For Figure 5 It is a three-dimensional structural schematic diagram after stripping for a section of the power transmission component used in

[0019] Figure 10 For Figure 9 It is a schematic cross-sectional structure diagram after magnification. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] In order to enable those skilled in the relevant technical field to better understand and implement this patent, the following provides a detailed description of the labels in the accompanying drawings in conjunction with the specification drawings.

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

[0022] Example 1: Please refer to Figures 1 to 4 , an easily assembled power cable, having a cable core and an outer sheath 2 covering the cable core, and the cable core is composed of four identical power transmission units 1; characterized in that: each power transmission unit 1 is composed of four first insulated wires 11 and a first insulator 12, the first insulated 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 integral structure, the cross-section of the first insulator body 121 is rectangular, the cross-section of the second insulator body 122 is rectangular, the second insulator body 122 is located below one end of the first insulator body 121, and three of the first insulated wires 11 are distributed in a row in the first insulator body 121, and the fourth first insulated wire 11 is located in the second insulator body 122; in the cable core, in the clockwise direction, the lower surface of the first insulator body 121 of the latter power transmission unit 1 is closely attached to the right surface of the first insulator body 121 of the previous power transmission unit 1, the left surface of the second insulator body 122 of the latter power transmission unit 1 is closely attached to the lower surface of the second insulator body 122 of the previous power transmission unit 1, and the upper surfaces of the first insulator bodies 121 of all power transmission units are joined together to form a square.

[0023] The above-mentioned upper surface, lower surface, left surface, and right surface are based on the Figure 4 schematic illustration as an example.

[0024] In this example, L1 = 3 times L2, and H1 = H2 = L2.

[0025] Example 2: Please refer to Figure 5 and Figure 10 , refer to Figures 1 to 4, An easily assembled power cable, having a cable core and an outer sheath 2 wrapped around the cable core. 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 insulated wires 11 and a first insulator 12. The first insulated wire 11 is composed of a first conductor 111 and a first insulating layer 112, and the first insulating layer 112 wraps 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 integral structure. The cross-section of the first insulator body 121 is rectangular, and the cross-section of the second insulator body 122 is rectangular. The second insulator body 122 is located directly below the first insulator body 121. Among them, three first insulated wires 11 are arranged in a row within the first insulator body 121, and the fourth first insulated wire 11 is located within the second insulator body 122; each power transmission component 1a is composed of four second insulated wires 11a and a second insulator 12a. The second insulated wire 11a is composed of a second conductor 111a and a second insulating layer 112a, and the second insulating layer 112a wraps the second conductor 111a. The second insulator 12a is composed of a first sub-insulator body 121a and a second sub-insulator body 122a. The second insulator 12a is an integral structure. The cross-section of the first sub-insulator body 121a is rectangular, and the cross-section of the second sub-insulator body 122a is rectangular. The second sub-insulator body 122a is located directly below the first sub-insulator body 121a. Among them, three second insulated wires 11a are arranged in a row within the first sub-insulator body 121a, and the fourth second insulated wire 11a is located within the second sub-insulator body 122a; the two power transmission units 1 are arranged opposite to each other, the second insulator bodies 122 of the two power transmission units 1 are opposite and do not touch, the two power transmission components 1a are arranged opposite to each other, the second sub-insulator bodies 122a of the two power transmission components 1a are opposite and joined together. The second insulator body 122 of the upper power transmission unit 1 is embedded in the upper groove formed by the joining of the second sub-insulator bodies 122a of the two power transmission components 1a, and the second insulator body 122 of the lower power transmission unit 1 is embedded in the lower groove formed by the joining of the second sub-insulator bodies 122a of the two power transmission components 1a. The cross-section of the cable core is rectangular.

[0026] In this embodiment, L1 = 3 times L2, H1 = L2, H2 = 0.75 times H1, L3 = L2; L1a = 2 times L2a, H1a = 1 / 3 times L1a, H2a = 0.5 times H1a, L3a = 0.75 times 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 very conveniently distinguished by the naked eye; in addition, the cross-sectional area of the first conductor in the second insulator 122 is equal to or slightly smaller than the cross-sectional area of the first conductor in the corresponding first insulator 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, it can be used for three-phase four-wire system, and when they are slightly smaller, it can be used as a ground wire.

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

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

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

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

[0032] For the above-mentioned easily assembled power cable, it is characterized in that: the material of the first insulator 121 is plastic.

[0033] For the above-mentioned easily assembled power cable, it is characterized in that: the material of the second insulator 122 is plastic.

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

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

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

[0037] In this application, in the first embodiment, a cable core with a square cross-section is formed by the mutual engagement of four L-shaped power transmission units 1. The shape of the outer sheath 2 matches that of the cable core and is also square, which facilitates assembly and disassembly and does not require a cabling and stranding device. Moreover, the four first insulated wires 11 can be used as a three-phase four-wire system, or a three-phase line with an additional ground wire, or two two-phase lines, so it is flexible in use. When used as a three-phase line with an additional ground wire, preferably, the first insulated wire 11 in the second insulator body 122 is used as the ground wire. Compared with a horizontal structure, that is, a structure with only one first insulator body 121 and four straight power transmission units inside, the ground wire is easier to distinguish, and the power transmission units are mutually engaged to form a cable core with a relatively stable structure.

[0038] In this application, in the first embodiment, by the engagement of two L-shaped power transmission units 1 and two power transmission components 1a, the technical problems existing in the prior art are also solved. The difference is that they cannot be firmly clamped to each other.

[0039] In this application, the concept of unity is the first insulator 12 composed of the first insulator body 121 and the second insulator body 122; or the second insulator 12a composed of the first sub-insulator body 121a and the second sub-insulator body 122a; and the second insulator body 122 or the second sub-insulator body 122a protrudes downward from the first insulator 12 or the second insulator 12a, except that their positions 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 direction mentioned in this application is relative. Because at the two ends of a cable, when looking from one end, it is clockwise, and when looking from the other end, it is counterclockwise.

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

[0042] This application has the following main beneficial technical effects: no stranding device is required during production, and defects caused by stranding will not occur; it can be suitable for laying in rectangular pipelines, has a high space utilization rate, and is convenient for assembly.

[0043] The above embodiments are only the preferred technical solutions of the present invention and should not be regarded as limitations on the present invention. The protection scope of the present invention should be the technical solutions recorded in the claims, including 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, having a cable core and an outer sheath covering the cable core, the cable core being composed of two identical power transmission units and two identical power transmission components; characterized in that: 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, and the first insulating layer covers the first conductor. The first insulator is composed of a first insulator body and a second insulator body, and the first insulator is an integral structure. The cross-section of the first insulator body is rectangular, and the cross-section of the second insulator body is rectangular. The second insulator body is located directly below the first insulator body. Among them, three first insulating wires are distributed in a row in the first insulator body, and the fourth first insulating wire is located in the second insulator body; each power 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, and the second insulating layer covers the second conductor. The second insulator is composed of a first sub-insulator and a second sub-insulator, and the second insulator is an integral structure. The cross-section of the first sub-insulator is rectangular, and the cross-section of the second sub-insulator is rectangular. The second sub-insulator is located directly below the first sub-insulator. Among them, three second insulating wires are distributed in a row in the first sub-insulator body, and the fourth second insulating wire is located in the second sub-insulator body; the two power transmission units are arranged oppositely, the second insulator bodies of the two power transmission units are opposite and do not touch, the two power transmission components are arranged oppositely, the second sub-insulators of the two power transmission components are opposite and joined together. The second insulator body of the upper power transmission unit is embedded in the upper groove formed by the joining of the second sub-insulators of the two power transmission components, and the second insulator body of the lower power transmission unit is embedded in the lower groove formed by the joining of the second sub-insulators of the two power transmission components. The cross-section of the cable core is rectangular.

2. The power cable that is easy to assemble according to claim 1, wherein: The material of the second conductor is copper or aluminum or copper alloy or aluminum alloy.

3. A power cable that is easy to assemble according to claim 1, characterized in that: The material of the second insulating layer is plastic.

4. The power cable that is easy to assemble according to claim 1, wherein: The material of the first sub-insulator is plastic.

5. A power cable that is easy to assemble according to claim 1, characterized in that: The material of the second sub-insulator is plastic.

6. The power cable that is easy to assemble according to claim 1, wherein: The material of the first conductor is copper or aluminum or copper alloy or aluminum alloy.

7. A power cable that is easy to assemble according to claim 1, wherein the material of the first insulating layer is plastic.

8. A power cable that is easy to assemble according to claim 1, wherein the material of the first insulator body is plastic; the material of the second insulator body is plastic.

9. A power cable that is easy to assemble according to claim 1, wherein the material of the outer sheath is plastic.

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