Cable with three unit bodies

Abstract

The invention belongs to the technical field of cables, and particularly relates to a cable with three unit bodies, the cable is provided with an outer protective layer and a cable core, the cable core is located in the outer protective layer, the cable core is composed of at least n three unit bodies with heat dissipation cavities, n is larger than or equal to 3 and is an integer, a circle is defined by the n three unit bodies, three electric units are arranged in the three unit bodies, and the heat dissipation cavities surround the electric units; the invention has the beneficial effects of stable structure, high heat dissipation efficiency, high processing efficiency, good protection effect on the electric unit and the like.

Description

Technical Field

[0001] The invention belongs to the technical field of cables, and in particular relates to a cable with three units. Background Art

[0002] The cable consists of one or more insulated cores, and their respective coatings, total protective layers and outer sheaths, and is used to transmit electrical (magnetic) energy, information and realize electromagnetic energy conversion.

[0003] In the prior art, CN111830653A discloses an optical cable with a special-shaped filling rope, which has an outer sheath, a tape layer, a central reinforcement member and at least three loose tubes, each of which is provided with at least one optical communication component, and is characterized in that a filling rope is further provided between two adjacent loose tubes, the filling rope is composed of a base and two forked support plates located at the top of the base, a cavity is formed between the two support plates toward the base, an embedding opening is formed at the top of the cavity, the bottom of the base is arc-shaped and fits with the surface of the central reinforcement member, and in a clockwise direction, the base of a previous filling rope and the support plate on the left side, and the base of a subsequent filling rope and the support plate on the right side are brought together to form an elliptical loose tube cavity, the loose tube is located in the loose tube cavity, and an electrical unit is provided in the cavity.

[0004] The above-mentioned prior art has the following defects: 1. The structure is relatively unstable; 2. The number of loose tubes that can be accommodated in the cable is small.

[0005] In the prior art, CN214753047U discloses an electric wire for household appliances, including a wire core group, a polyvinyl chloride insulation sleeve extruded outside the wire core group, and a polyvinyl chloride sheath extruded outside the polyvinyl chloride insulation sleeve, the wire core group includes a first phase line, a second phase line and a third phase line distributed in a triangular shape, and V-shaped buffer strips for clamping the first phase line, the second phase line and the third phase line are evenly distributed on the polyvinyl chloride insulation sleeve, and the two sides of the V-shaped buffer strip and the inner wall of the polyvinyl chloride insulation sleeve together enclose a second buffer cavity, and a bow-shaped buffer strip for strengthening buffering is embedded in the second buffer cavity.

[0006] The above-mentioned prior art has the following defects: 1. The heat dissipation performance is poor; 2. The number of electrical units that can be accommodated in the cable is small. Summary of the invention

[0007] In order to solve the above problems, the purpose of the present invention is to disclose a cable with three units, which is achieved by adopting the following technical solutions.

[0008] A cable with three-unit bodies comprises an outer sheath and a cable core, wherein the cable core is located inside the outer sheath, and the cable core is composed of at least n three-unit bodies with heat dissipation cavities, where n≥3, and n is an integer. The three-unit bodies form a circle, and three electrical units are arranged inside the n three-unit bodies, and the heat dissipation cavity surrounds the outside of the electrical unit.

[0009] The above-mentioned cable with three units consists of a protective layer and three electrical units. The protective layer consists of three arc-shaped outer protective layers, three inner protective layers and three connecting components. The arc of the outer protective layer is greater than 180°. The three outer protective layers are connected end to end to form a closed loop. The three inner protective layers are respectively located in a corresponding outer protective layer. The inner protective layer and the corresponding outer protective layer are concentric. A heat dissipation cavity is formed between the inner protective layer and the corresponding outer protective layer. The three heat dissipation cavities are connected. The three connecting components are located in the closed loop. The connecting parts of two adjacent outer protective layers are connected to one end of a corresponding connecting component, and the other end of the connecting component is connected to a corresponding inner protective layer. An electrical unit cavity is provided in the inner protective layer, and the electrical unit is located in the corresponding electrical unit cavity.

[0010] In the above-mentioned cable with three-unit bodies, when 3≤n≤5, one angle of the triangle formed by the line connecting the centers of the three inner protective layers of the three-unit body points to the center of the cable core, the outer protective layers of two adjacent three-unit bodies close to the center of the cable core abut against each other, and a self-supporting unit is provided between the two adjacent three-unit bodies and the tape layer; The self-supporting unit comprises a suspension wire, a suspension wire sheath, a first rib, and a self-supporting unit sheath. The suspension wire is located in the suspension wire sheath. The suspension wire sheath and the self-supporting unit sheath are connected by the first rib. A three-unit body is provided in the self-supporting unit sheath. The suspension wire sheath, the first rib and the self-supporting unit sheath are integrally formed. The suspension wire sheath abuts against the outer protective layers of two adjacent three-unit bodies close to the cable core center, the self-supporting unit sheath abuts against the two adjacent outer protective layers of two adjacent three-unit bodies away from the cable core center, and the self-supporting unit sheath abuts against the outer sheath.

[0011] For the above-mentioned cable with three-unit bodies, when n=6, one angle of the triangle formed by the line connecting the centers of the three inner protective layers of the three-unit bodies points to the center of the cable core, the outer protective layers of two adjacent three-unit bodies close to the center of the cable core offset each other, and the two adjacent outer protective layers of two adjacent three-unit bodies far from the center of the cable core offset each other.

[0012] In the above-mentioned cable with three-unit bodies, a central reinforcement piece is provided between the six three-unit bodies, and the outer protective layer of the three-unit body close to the center of the cable core is against the central reinforcement piece.

[0013] In the above-mentioned cable with three-unit bodies, when n>6, one corner of the triangle formed by the line connecting the centers of the three inner protective layers of the three-unit body points to the center of the cable core, a gap is formed between the outer protective layers of two adjacent three-unit bodies close to the center of the cable core, and the two outer protective layers (311) of two adjacent three-unit bodies (3) far from the center of the cable core and adjacent to each other are offset; A butterfly unit is clamped in the gap, the butterfly unit is composed of a first reinforcement member sheath, a first reinforcement member, a second reinforcement member, a second reinforcement member sheath and a second rib, the first reinforcement member sheath is extruded outside the first reinforcement member, the second reinforcement member sheath is extruded outside the second reinforcement member, the first reinforcement member sheath and the second reinforcement member sheath are connected by the second rib, the first reinforcement member sheath, the second reinforcement member sheath and the second rib are integrally formed, and the second reinforcement member is an electrical unit; An inner protective layer is also provided between all three units. The first reinforcement protective layers of the butterfly unit are respectively inserted into the corresponding gaps. The second rib is fitted with two adjacent outer protective layers. The second reinforcement protective layer of the butterfly unit is in conflict with the inner protective layer. The outer protective layer of the three units close to the center of the cable core is in conflict with the inner protective layer. A three unit is provided in the inner protective layer.

[0014] In the above-mentioned cable with three-unit bodies, when n>6 and n is an even number, one angle of the triangle formed by the line connecting the centers of the three inner protective layers of the three-unit body points to the center of the cable core, a gap is formed between the outer protective layers of two adjacent three-unit bodies close to the center of the cable core, and the two adjacent outer protective layers (311) of two adjacent three-unit bodies (3) far from the center of the cable core are offset against each other; The cable core is also provided with n / 2 self-supporting units and n / 2 butterfly units; The self-supporting unit comprises a suspension wire, a suspension wire sheath, a first rib, and a self-supporting unit sheath. The suspension wire is located in the suspension wire sheath. The suspension wire sheath and the self-supporting unit sheath are connected by the first rib. A three-unit body is provided in the self-supporting unit sheath. The suspension wire sheath, the first rib and the self-supporting unit sheath are integrally formed. The butterfly unit is composed of a first reinforcement member sheath, a first reinforcement member, a second reinforcement member, a second reinforcement member sheath and a second rib, the first reinforcement member sheath is extruded outside the first reinforcement member, the second reinforcement member sheath is extruded outside the second reinforcement member, the first reinforcement member sheath and the second reinforcement member sheath are connected by the second rib, the first reinforcement member sheath, the second reinforcement member sheath and the second rib are integrally formed, and the second reinforcement member is an electrical unit; The suspension wire sheath of the self-supporting unit and the first reinforcement sheath of the butterfly-shaped unit are respectively inserted into the corresponding gaps, the self-supporting unit and the butterfly-shaped unit are distributed at intervals, the first rib is in contact with the two adjacent outer protective layers, the second rib is in contact with the two adjacent outer protective layers, the self-supporting unit sheaths of adjacent self-supporting units are in conflict with each other, and the second reinforcement sheath of the butterfly-shaped unit is in conflict with the two adjacent outer protective layers and the two self-supporting unit sheaths.

[0015] In the above-mentioned three-unit cable, an optical fiber is arranged in the second rib.

[0016] In the above-mentioned three-unit cable, a tape layer is provided between the cable core and the outer sheath.

[0017] The outer sheath of the three-unit cable described above is made of cross-linked polyethylene or polyvinyl chloride.

[0018] The cable having three units described above has a tape covering layer made of steel tape.

[0019] In the above-mentioned three-unit cable, the material of the protective layer is insulating material.

[0020] In the above-mentioned three-unit cable, the materials of the suspension wire sheath, the first rib and the self-supporting unit sheath are cross-linked polyethylene or polyvinyl chloride.

[0021] In the above-mentioned three-unit cable, the suspension wire is made of stainless steel wire.

[0022] In the above-mentioned three-unit cable, the first reinforcement member is a stainless steel wire.

[0023] In the above-mentioned three-unit cable, the materials of the first reinforcement member sheath, the second reinforcement member sheath and the second rib are polyvinyl chloride.

[0024] In the above-mentioned cable with three units, the optical fiber is a single-mode optical fiber.

[0025] In the above-mentioned cable with three units, the material of the inner sheath is cross-linked polyethylene or polyvinyl chloride.

[0026] In the above-mentioned three-unit cable, the central reinforcement member is a stainless steel wire.

[0027] The present invention has the following beneficial effects: 1. A heat dissipation cavity is provided inside the three-unit body, and the heat dissipation cavity almost surrounds the inner protective layer. The heat dissipation efficiency of the electric unit in the inner protective layer is higher, which can effectively slow down the thermal aging of the inner protective layer.

[0028] 2. The outer protective layer and inner protective layer of the three-unit body are integrally formed, which has higher processing efficiency.

[0029] 3. The electrical unit has double protection of outer protective layer and inner protective layer, which has better protection effect.

[0030] 4. The outer protective layer and the inner protective layer do not touch each other, so that the electrical unit has better impact and vibration resistance.

[0031] 5. Make full use of the gap between two adjacent three-unit bodies to fix the self-supporting unit and the butterfly-shaped unit, so that the transmission unit density of the cable core is higher and the structure of the cable core is more stable. The self-supporting unit and the butterfly-shaped unit do not need to use fixing materials, and the cabling is convenient and fast with low cost.

[0032] 6. There are two outer protective layers on both sides of the optical fiber. Due to the existence of the heat dissipation cavity, the outer protective layers are elastic, which can not only make the self-supporting unit and the butterfly unit more firmly fixed, but also reduce the transmission performance of the optical fiber in the butterfly unit due to the extrusion of the three-unit body. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a schematic diagram of the three-dimensional structure of a section of Example 1 of the present invention.

[0034] Figure 2 It is a front view of embodiment 1 of the present invention.

[0035] Figure 3 It is a schematic diagram of the three-dimensional structure of the three-unit body of Example 1 of the present invention.

[0036] Figure 4 It is a front view of the three-unit body of Example 1 of the present invention.

[0037] Figure 5 It is a front view of the self-supporting unit of Example 1 of the present invention.

[0038] Figure 6 It is a front view of the butterfly unit of Example 1 of the present invention.

[0039] Figure 7 It is a front view of the butterfly unit of embodiment 2 of the present invention.

[0040] Figure 8 It is a schematic diagram of the three-dimensional structure of a section of Example 3 of the present invention.

[0041] Fig. 9 It is a front view of embodiment 3 of the present invention.

[0042] Fig.10 It is a front view of embodiment 4 of the present invention.

[0043] Fig.11 It is a front view of embodiment 5 of the present invention.

[0044] In the figure, 1. outer protective layer, 2. wrapping layer, 3. three-unit body, 31. protective layer, 311. outer protective layer, 312. heat dissipation cavity, 313. inner protective layer, 314. electrical unit cavity, 315. connecting component, 32. electrical unit, 4. self-supporting unit, 41. suspension wire, 42. suspension wire protective layer, 43. rib, 44. self-supporting unit protective layer, 5. butterfly unit, 51. first reinforcement member protective layer, 52. first reinforcement member, 53. second reinforcement member, 54. second reinforcement member protective layer, 55. second rib, 56. optical fiber, 6. inner protective layer, 7. center reinforcement member. DETAILED DESCRIPTION

[0045] Example 1: Figures 1 to 6 , a cable with three units, comprising an outer sheath 1 and a cable core, wherein the cable core is located inside the outer sheath 1, and the cable core is composed of eight three units 3, four self-supporting units 4 and four butterfly units 5; The three-unit body 3 is composed of a protective layer 31 and three electrical units 32. The protective layer 31 is composed of three arc-shaped outer protective layers 311, three inner protective layers 313 and three connecting components 315. The arc of the outer protective layer 311 is greater than 180°. The three outer protective layers 311 are connected end to end to form a closed loop. The three inner protective layers 313 are respectively located in a corresponding outer protective layer 311. The inner protective layer 313 and the corresponding outer protective layer 311 are concentric. A heat dissipation cavity 312 is formed between the inner protective layer 313 and the corresponding outer protective layer 311. The three heat dissipation cavities 312 are connected. The three connecting components 315 are located in the closed loop. The connecting parts of two adjacent outer protective layers 311 are connected to one end of a corresponding connecting component 315, and the other end of the connecting component 315 is connected to a corresponding inner protective layer 313. An electrical unit cavity 314 is provided in the inner protective layer 313, and the electrical unit 32 is located in the corresponding electrical unit cavity 314. The self-supporting unit 4 comprises a suspension wire 41, a suspension sheath 42, a first rib 43, and a self-supporting unit sheath 44. The suspension wire 41 is located in the suspension sheath 42. The suspension sheath 42 and the self-supporting unit sheath 44 are connected by the first rib 43. A three-unit body 3 is arranged in the self-supporting unit sheath 44. The suspension sheath 42, the first rib 43 and the self-supporting unit sheath 44 are integrally formed. The butterfly unit 5 is composed of a first reinforcement member sheath 51, a first reinforcement member 52, a second reinforcement member 53, a second reinforcement member sheath 54 and a second rib 55. The first reinforcement member sheath 51 is extruded outside the first reinforcement member 52, the second reinforcement member sheath 54 is extruded outside the second reinforcement member 53, the first reinforcement member sheath 51 and the second reinforcement member sheath 54 are connected by the second rib 55, the first reinforcement member sheath 51, the second reinforcement member sheath 54 and the second rib 55 are integrally formed, and the second reinforcement member 53 is the electrical unit 32; One corner of the triangle formed by the line connecting the centers of the three inner protective layers 313 of the eight three-unit bodies 3 points to the center of the cable core, a gap is formed between the outer protective layers 311 of two adjacent three-unit bodies 3 close to the center of the cable core, and the two adjacent outer protective layers 311 of two adjacent three-unit bodies 3 far away from the center of the cable core are against each other, the suspension wire sheaths 42 of the four self-supporting units 4 and the first reinforcement sheaths 51 of the four butterfly-shaped units 5 are respectively inserted into the corresponding gaps, the four self-supporting units 4 and the four butterfly-shaped units 5 are distributed at intervals, the first rib 43 is in contact with the two adjacent outer protective layers 311, the second rib 55 is in contact with the two adjacent outer protective layers 311, the self-supporting unit sheaths 44 of the adjacent self-supporting units 4 are in conflict, and the second reinforcement sheath 54 of the butterfly-shaped unit 5 is in conflict with the two adjacent outer protective layers 311 and the two self-supporting unit sheaths 44.

[0046] Example 2: Figure 7 , and refer to Figures 1 to 5 , a cable with three units, this embodiment is basically the same as embodiment 1, except that: an optical fiber 56 is provided in the second rib 55.

[0047] Example 3: Figure 8 and Fig. 9 , and refer to Figure 3 , Figure 4 and Figure 7 , a cable with three units, comprising an outer sheath 1 and a cable core, wherein the cable core is located inside the outer sheath 1, and the cable core is composed of nine three units 3, eight butterfly units 5, and an inner sheath 6; The three-unit body 3 is composed of a protective layer 31 and three electrical units 32. The protective layer 31 is composed of three arc-shaped outer protective layers 311, three inner protective layers 313 and three connecting components 315. The arc of the outer protective layer 311 is greater than 180°. The three outer protective layers 311 are connected end to end to form a closed loop. The three inner protective layers 313 are respectively located in a corresponding outer protective layer 311. The inner protective layer 313 and the corresponding outer protective layer 311 are concentric. A heat dissipation cavity 312 is formed between the inner protective layer 313 and the corresponding outer protective layer 311. The three heat dissipation cavities 312 are connected. The three connecting components 315 are located in the closed loop. The connecting parts of two adjacent outer protective layers 311 are connected to one end of a corresponding connecting component 315, and the other end of the connecting component 315 is connected to a corresponding inner protective layer 313. An electrical unit cavity 314 is provided in the inner protective layer 313, and the electrical unit 32 is located in the corresponding electrical unit cavity 314. The butterfly unit 5 is composed of a first reinforcement member sheath 51, a first reinforcement member 52, a second reinforcement member 53, a second reinforcement member sheath 54 and a second rib 55. The first reinforcement member sheath 51 is extruded outside the first reinforcement member 52, the second reinforcement member sheath 54 is extruded outside the second reinforcement member 53, the first reinforcement member sheath 51 and the second reinforcement member sheath 54 are connected by the second rib 55, the first reinforcement member sheath 51, the second reinforcement member sheath 54 and the second rib 55 are integrally formed, and the second reinforcement member 53 is the electrical unit 32; A three-unit body 3 is located in the inner sheath 6; Another eight triple units 3 are located around the inner protective layer 6, and one corner of the triangle formed by the line connecting the centers of the three inner protective layers 313 of the other eight triple units 3 points to the center of the cable core. A gap is formed between the outer protective layers 311 of two adjacent triple units 3 close to the center of the cable core, and the two adjacent outer protective layers 311 of two adjacent triple units 3 far away from the center of the cable core are against each other. The first reinforcement protective layers 51 of the eight butterfly units 5 are respectively inserted into the corresponding gaps, and the second ribs 55 are fitted with the two adjacent outer protective layers 311. The second reinforcement protective layers 54 of the butterfly unit 5 are respectively in conflict with the inner protective layer 6, and the outer protective layers 311 of the eight triple units 3 close to the center of the cable core are respectively in conflict with the inner protective layer 6, and an optical fiber 56 is arranged in the second rib 55.

[0048] Example 4: Fig.10 , and refer to Figures 3 to 5 , a cable with three units, comprising an outer sheath 1 and a cable core, wherein the cable core is located inside the outer sheath 1, and the cable core is composed of three three units 3 and three self-supporting units 4; The three-unit body 3 is composed of a protective layer 31 and three electrical units 32. The protective layer 31 is composed of three arc-shaped outer protective layers 311, three inner protective layers 313 and three connecting components 315. The arc of the outer protective layer 311 is greater than 180°. The three outer protective layers 311 are connected end to end to form a closed loop. The three inner protective layers 313 are respectively located in a corresponding outer protective layer 311. The inner protective layer 313 and the corresponding outer protective layer 311 are concentric. A heat dissipation cavity 312 is formed between the inner protective layer 313 and the corresponding outer protective layer 311. The three heat dissipation cavities 312 are connected. The three connecting components 315 are located in the closed loop. The connecting parts of two adjacent outer protective layers 311 are connected to one end of a corresponding connecting component 315, and the other end of the connecting component 315 is connected to a corresponding inner protective layer 313. An electrical unit cavity 314 is provided in the inner protective layer 313, and the electrical unit 32 is located in the corresponding electrical unit cavity 314. The self-supporting unit 4 comprises a suspension wire 41, a suspension sheath 42, a first rib 43, and a self-supporting unit sheath 44. The suspension wire 41 is located in the suspension sheath 42. The suspension sheath 42 and the self-supporting unit sheath 44 are connected by the first rib 43. A three-unit body 3 is arranged in the self-supporting unit sheath 44. The suspension sheath 42, the first rib 43 and the self-supporting unit sheath 44 are integrally formed. One corner of the triangle formed by the line connecting the centers of the three inner protective layers 313 of the three three-unit bodies 3 points to the center of the cable core, the outer protective layers 311 of two adjacent three-unit bodies 3 close to the center of the cable core abut against each other, a self-supporting unit 4 is provided between the two adjacent three-unit bodies 3 and the wrapping layer 2, the suspension wire sheath 42 abuts against the outer protective layers 311 of the two adjacent three-unit bodies 3 close to the center of the cable core, the self-supporting unit sheath 44 abuts against the two adjacent outer protective layers 311 of the two adjacent three-unit bodies 3 away from the center of the cable core, and the self-supporting unit sheath 44 abuts against the outer sheath 1.

[0049] Example 5: Fig.11 , and refer to Figure 3 and Figure 4 A cable with three-unit body, comprising an outer sheath 1 and a cable core, wherein the cable core is located inside the outer sheath 1, and the cable core is composed of six three-unit bodies 3 and a central reinforcement member 7, wherein the six three-unit bodies 3 are located around the central reinforcement member 7; The three-unit body 3 is composed of a protective layer 31 and three electrical units 32. The protective layer 31 is composed of three arc-shaped outer protective layers 311, three inner protective layers 313 and three connecting components 315. The arc of the outer protective layer 311 is greater than 180°. The three outer protective layers 311 are connected end to end to form a closed loop. The three inner protective layers 313 are respectively located in a corresponding outer protective layer 311. The inner protective layer 313 and the corresponding outer protective layer 311 are concentric. A heat dissipation cavity 312 is formed between the inner protective layer 313 and the corresponding outer protective layer 311. The three heat dissipation cavities 312 are connected. The three connecting components 315 are located in the closed loop. The connecting parts of two adjacent outer protective layers 311 are connected to one end of a corresponding connecting component 315, and the other end of the connecting component 315 is connected to a corresponding inner protective layer 313. An electrical unit cavity 314 is provided in the inner protective layer 313, and the electrical unit 32 is located in the corresponding electrical unit cavity 314. One corner of the triangle formed by the line connecting the centers of the three inner protective layers 313 of the three-unit body 3 points to the center of the cable core, the outer protective layers 311 of two adjacent three-unit bodies 3 close to the center of the cable core abut against each other, and the outer protective layers 311 of the three-unit body 3 close to the center of the cable core abut against the central reinforcement 7, and the two adjacent outer protective layers 311 of two adjacent three-unit bodies 3 far from the center of the cable core abut against each other.

[0050] In the above-mentioned three-unit cable, a tape layer 2 is provided between the cable core and the outer sheath 1 .

[0051] In the above-mentioned three-unit cable, the material of the outer sheath 1 is cross-linked polyethylene or polyvinyl chloride.

[0052] In the above-mentioned three-unit cable, the tape layer 2 is a steel tape.

[0053] In the above-mentioned three-unit cable, the material of the protective layer 31 is insulating material.

[0054] In the above-mentioned three-unit cable, the materials of the suspension wire sheath 42, the first rib 43 and the self-supporting unit sheath 44 are cross-linked polyethylene or polyvinyl chloride.

[0055] In the above-mentioned three-unit cable, the suspension wire 41 is a stainless steel wire.

[0056] In the above-mentioned three-unit cable, the first reinforcement member 52 is a stainless steel wire.

[0057] In the above-mentioned three-unit cable, the materials of the first reinforcement member sheath 51, the second reinforcement member sheath 54 and the second rib 55 are polyvinyl chloride.

[0058] In the above-mentioned cable with three units, the optical fiber 56 is a single-mode optical fiber.

[0059] In the above-mentioned three-unit cable, the material of the inner sheath 6 is cross-linked polyethylene or polyvinyl chloride.

[0060] In the above-mentioned three-unit cable, the central reinforcement member 7 is made of stainless steel wire.

[0061] The present invention has the following beneficial effects: 1. A heat dissipation cavity 312 is provided in the three-unit body 3, and the heat dissipation cavity 312 almost surrounds the inner protective layer 313. The heat dissipation efficiency of the electric unit 32 in the inner protective layer 313 is higher, which can effectively slow down the thermal aging of the inner protective layer 313.

[0062] 2. The outer protective layer 311 and the inner protective layer 313 of the three-unit body 3 are integrally formed, which has higher processing efficiency.

[0063] 3. The electrical unit 32 has double protection of an outer protective layer 311 and an inner protective layer 313, and the protection effect is better.

[0064] 4. The outer protective layer 311 and the inner protective layer 313 are not in contact, so that the electrical unit 32 has better impact and shock resistance.

[0065] 5. Make full use of the gap between two adjacent three-unit bodies 3 to fix the self-supporting unit 4 and the butterfly-shaped unit 5, so that the transmission unit density of the cable core is higher and the structure of the cable core is more stable. The self-supporting unit 4 and the butterfly-shaped unit 5 do not need to be fixed with fixing materials, so the cabling is convenient and fast with low cost.

[0066] 6. There are two outer protective layers 311 on both sides of the optical fiber 56. Due to the existence of the heat dissipation cavity 312, the outer protective layer 311 is elastic, which can not only make the self-supporting unit 4 and the butterfly unit 5 more firmly fixed, but also reduce the transmission performance of the optical fiber 56 in the butterfly unit 5 due to the extrusion of the three-unit body 3.

[0067] 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. A three-unit cable, comprising an outer sheath (1) and a cable core, wherein the cable core is located inside the outer sheath (1), characterized in that: The cable core is composed of at least n three-unit bodies (3) having heat dissipation cavities (312), where n≥3 and n is an integer. The n three-unit bodies (3) form a circle, three electrical units (32) are arranged in the three-unit body (3), and the heat dissipation cavity (312) surrounds the outside of the electrical unit (32).

2. A three-unit cable according to claim 1, characterized in that: The three-unit body (3) is composed of a protective layer (31) and three electrical units (32); the protective layer (31) is composed of three arc-shaped outer protective layers (311), three inner protective layers (313) and three connecting components (315); the arc of the outer protective layer (311) is greater than 180°; the three outer protective layers (311) are connected end to end to form a closed loop; the three inner protective layers (313) are respectively located in a corresponding outer protective layer (311); the inner protective layer (313) and the corresponding outer protective layer (311) are concentric; ... A heat dissipation cavity (312) is formed between the outer protective layer (311) and the corresponding outer protective layer (313), the three heat dissipation cavities (312) are connected to each other, the three connecting components (315) are located in a closed loop, the connecting parts of two adjacent outer protective layers (311) are connected to one end of a corresponding connecting component (315), the other end of the connecting component (315) is connected to a corresponding inner protective layer (313), an electric unit cavity (314) is provided in the inner protective layer (313), and the electric unit (32) is located in the corresponding electric unit cavity (314).

3. A three-unit cable according to claim 2, characterized in that: When 3≤n≤5, one corner of the triangle formed by the line connecting the centers of the three inner protective layers (313) of the three-unit body (3) points to the center of the cable core, the outer protective layers (311) close to the center of the cable core of two adjacent three-unit bodies (3) abut against each other, and a self-supporting unit (4) is provided between the two adjacent three-unit bodies (3) and the tape layer (2); The self-supporting unit (4) comprises a suspension wire (41), a suspension wire sheath (42), a first rib (43), and a self-supporting unit sheath (44); the suspension wire (41) is located in the suspension wire sheath (42); the suspension wire sheath (42) and the self-supporting unit sheath (44) are connected via the first rib (43); a three-unit body (3) is provided in the self-supporting unit sheath (44); the suspension wire sheath (42), the first rib (43), and the self-supporting unit sheath (44) are integrally formed; The suspension wire sheath (42) abuts against the outer protective layers (311) of two adjacent three-unit bodies (3) close to the cable core center, the self-supporting unit sheath (44) abuts against the two adjacent outer protective layers (311) of two adjacent three-unit bodies (3) far from the cable core center, and the self-supporting unit sheath (44) abuts against the outer sheath (1).

4. A three-unit cable according to claim 2, characterized in that: When n=6, one corner of the triangle formed by the line connecting the centers of the three inner protective layers (313) of the three-unit body (3) points to the center of the cable core, the outer protective layers (311) of two adjacent three-unit bodies (3) close to the center of the cable core abut against each other, and the two adjacent outer protective layers (311) of two adjacent three-unit bodies (3) far from the center of the cable core abut against each other.

5. According to the cable with three-unit bodies as described in claim 4, a central reinforcement member (7) is also provided between the six three-unit bodies (3), and the outer protective layer (311) of the three-unit body (3) close to the center of the cable core is against the central reinforcement member (7).

6. A three-unit cable according to claim 2, characterized in that: When n>6, one corner of the triangle formed by the line connecting the centers of the three inner protective layers (313) of the three-unit body (3) points to the center of the cable core, a gap is formed between the outer protective layers (311) of two adjacent three-unit bodies (3) close to the center of the cable core, and the two adjacent outer protective layers (311) of two adjacent three-unit bodies (3) far from the center of the cable core are offset against each other; A butterfly unit (5) is clamped in the gap. The butterfly unit (5) is composed of a first reinforcement member protective layer (51), a first reinforcement member (52), a second reinforcement member (53), a second reinforcement member protective layer (54) and a second rib (55). The first reinforcement member protective layer (51) is extruded outside the first reinforcement member (52), the second reinforcement member protective layer (54) is extruded outside the second reinforcement member (53), the first reinforcement member protective layer (51) and the second reinforcement member protective layer (54) are connected via the second rib (55), the first reinforcement member protective layer (51), the second reinforcement member protective layer (54) and the second rib (55) are integrally formed, and the second reinforcement member (53) is an electrical unit (32). An inner protective layer (6) is also provided between all the three-unit bodies (3); the first reinforcing member protective layers (51) of the butterfly-shaped unit (5) are respectively inserted into the corresponding gaps; the second rib (55) is fitted with two adjacent outer protective layers (311); the second reinforcing member protective layer (54) of the butterfly-shaped unit (5) is in conflict with the inner protective layer (6); the outer protective layer (311) of the three-unit body (3) close to the center of the cable core is in conflict with the inner protective layer (6); and a three-unit body (3) is provided in the inner protective layer (6).

7. A three-unit cable according to claim 2, characterized in that: When n>6, and n is an even number, one corner of the triangle formed by the line connecting the centers of the three inner protective layers (313) of the three-unit body (3) points to the center of the cable core, a gap is formed between the outer protective layers (311) of two adjacent three-unit bodies (3) close to the center of the cable core, and the two adjacent outer protective layers (311) of two adjacent three-unit bodies (3) far from the center of the cable core are offset against each other; The cable core is also provided with n / 2 self-supporting units (4) and n / 2 butterfly-shaped units (5); The self-supporting unit (4) comprises a suspension wire (41), a suspension wire sheath (42), a first rib (43), and a self-supporting unit sheath (44); the suspension wire (41) is located in the suspension wire sheath (42); the suspension wire sheath (42) and the self-supporting unit sheath (44) are connected via the first rib (43); a three-unit body (3) is provided in the self-supporting unit sheath (44); the suspension wire sheath (42), the first rib (43), and the self-supporting unit sheath (44) are integrally formed; The butterfly unit (5) is composed of a first reinforcement member protective layer (51), a first reinforcement member (52), a second reinforcement member (53), a second reinforcement member protective layer (54) and a second rib (55); the first reinforcement member protective layer (51) is extruded outside the first reinforcement member (52); the second reinforcement member protective layer (54) is extruded outside the second reinforcement member (53); the first reinforcement member protective layer (51) and the second reinforcement member protective layer (54) are connected via the second rib (55); the first reinforcement member protective layer (51), the second reinforcement member protective layer (54) and the second rib (55) are integrally formed; and the second reinforcement member (53) is an electrical unit (32); The suspension wire sheath (42) of the self-supporting unit (4) and the first reinforcement member sheath (51) of the butterfly unit (5) are respectively inserted into corresponding gaps, the self-supporting unit (4) and the butterfly unit (5) are spaced apart, the first rib (43) is in contact with two adjacent outer protective layers (311), the second rib (55) is in contact with two adjacent outer protective layers (311), the self-supporting unit sheaths (44) of adjacent self-supporting units (4) are in contact with each other, and the second reinforcement member sheath (54) of the butterfly unit (5) is in contact with two adjacent outer protective layers (311) and two self-supporting unit sheaths (44).

8. A three-unit cable according to claim 6 or claim 7, characterized in that: An optical fiber (56) is disposed inside the second rib (55).

9. A three-unit cable according to claim 8, characterized in that: A tape layer (2) is provided between the cable core and the outer sheath (1).

10. A three-unit cable according to claim 9, characterized in that: The tape layer (2) is a steel tape.

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