Extensible multi-core fireproof flame-retardant power cable

Abstract

The invention belongs to the technical field of cables, and particularly relates to an extensible multi-core fireproof flame-retardant power cable which is provided with a plurality of first electric units, (n + 1) (n + 2) / 2 first protection components and n (n + 1) / 2 second protection components, n is larger than or equal to 1, all the first protection components are distributed in n layers, the number of the first protection components on the nth layer is n from bottom to top, and the number of the second protection components on the nth layer is larger than or equal to 1. The first protection part of the lower layer and the two corresponding adjacent first protection parts of the upper layer are fixed through one second protection part, and the first electric units are located in the first protection parts; the cable has the beneficial effects that the electrical units are extensible, the cost is low, the laying efficiency is high, and the electrical units are well protected.

Description

Technical Field

[0001] The invention belongs to the technical field of cables, and in particular relates to an expandable multi-core fireproof and flame-retardant power cable. Background Art

[0002] As people's production and living quality improve, the demand for electricity is increasing.

[0003] In the prior art, CN117826352A discloses a combinable ribbon optical cable, which has at least one protective layer and a cable core, wherein the cable core has one or more first subunits, wherein the first subunit includes two assembly components that can be assembled into an I-shaped structure, wherein the I-shaped structure has a first cavity and a second cavity, wherein the first subunit has a plurality of optical fiber ribbons; the optical fiber ribbons are distributed in the first cavity and the second cavity in a stacked manner, and at least one protective layer is coated outside the cable core. The present invention also discloses a butterfly optical cable and an electric cable.

[0004] The above-mentioned prior art has the following drawbacks: 1. The assembled parts cannot be fixed to each other, so it is impossible to add electrical units after the installation is completed; 2. The mechanical properties are relatively poor. Summary of the invention

[0005] In order to solve the above problems, the purpose of the present invention is to disclose an expandable multi-core fire-resistant and flame-retardant power cable, which is achieved by adopting the following technical solutions.

[0006] An expandable multi-core fire-resistant and flame-retardant power cable, comprising an outer sheath, a plurality of first electrical units, (n+1)(n+2) / 2 first protection components and n(n+1) / 2 second protection components, n≥1, all first protection components are distributed in n layers, and from bottom to top, the number of first protection components in the nth layer is n; The first protection component of the next layer and the corresponding two adjacent first protection components of the previous layer are fixed by a second protection component, and the first electrical unit is located in the first protection component; The outer protective layer is located outside the first protective component and the second protective component.

[0007] The expandable multi-core fire-retardant power cable described above, the first protection component is composed of six first protection strips and three first support components, the six first protection strips form a first regular hexagon, the three first support components are located in the first regular hexagon, one end of the three first support components is connected to the center of the first regular hexagon, the angle between two adjacent first support components is 120°, the other ends of the three first support components are respectively connected to a corner of the corresponding first regular hexagon, a first opening is provided at the corner of the first regular hexagon that is not connected to the first support component, and a rhombus-shaped first cavity is formed between two adjacent first support components and the corresponding two first protection strips; The second protection component is composed of six second protection strips and three second support components. The six second protection strips form a second regular hexagon. The three second support components are located in the second regular hexagon. One end of the three second support components is connected to the center of the second regular hexagon. The angle between two adjacent second support components is 120°. The other ends of the three second support components are respectively connected to a corner of the corresponding second regular hexagon. A second opening is provided at the corner of the second regular hexagon that is not connected to the second support component. A rhombus-shaped second cavity is formed between two adjacent second support components and the corresponding two second protection strips. The first opening of a first protective component of the next layer and the first openings of two first protective components of the previous layer adjacent thereto point to a common center, the two first protective strips on the upper side of a first protective component of the next layer overlap and stick to the corresponding first protective strips of two adjacent first protective components of the previous layer respectively, and the adjacent first protective strips of two adjacent first protective components of the same layer overlap and stick to each other; The three second supporting parts of the second protection part are respectively inserted into the corresponding first openings pointing to the common center, the two second protection strips connected to the second supporting parts are located in the corresponding first cavities, the second protection strips are respectively attached to the corresponding first supporting parts, and the ends of the second protection strips not connected to the second supporting parts are respectively against the corresponding first protection strips; The second supporting component divides the corresponding first cavity into two electric unit cavities. One first electric unit is arranged in the electric unit cavity, and one second electric unit is arranged in the other first cavity.

[0008] The above-mentioned expandable multi-core fire-retardant power cable, the second electrical unit is composed of a second electrical unit sheath, two inner sheaths and two conductors, the second electrical unit sheath is rhombus-shaped, the two obtuse angles of the second electrical unit sheath are recessed toward the center, the two inner sheaths are located in the second electrical unit sheath, and are respectively located on both sides of the recess, the left inner sheath is connected to the upper recess, the right inner sheath is connected to the lower recess, a ∽ gap is formed between the two inner sheaths and the second electrical unit sheath, and the conductors are respectively located in the corresponding inner sheaths; The two acute angles of the second electrical unit sheath are clamped in the two acute angles of the corresponding first cavity, and the four side walls of the second electrical unit sheath are respectively attached to the four inner walls of the corresponding first cavity.

[0009] In the above-mentioned expandable multi-core fire-retardant power cable, the material of the first protective component is cross-linked polyethylene.

[0010] In the above-mentioned expandable multi-core fire-retardant power cable, the material of the second protective component is cross-linked polyethylene.

[0011] In the above-mentioned expandable multi-core fire-resistant and flame-retardant power cable, the first electrical unit is composed of a conductor and an insulating layer extruded outside the conductor.

[0012] In the above-mentioned expandable multi-core fire-resistant and flame-retardant power cable, the material of the second electrical unit sheath is insulating material.

[0013] The above-mentioned expandable multi-core fire-resistant and flame-retardant power cable has a reinforcement component that is a steel belt.

[0014] In the above-mentioned expandable multi-core fire-resistant and flame-retardant power cable, all the first protection components and the second protection components are provided with an outer protective layer.

[0015] The material of the outer sheath of the expandable multi-core fire-retardant power cable described above is polyethylene.

[0016] In the above-mentioned expandable multi-core fire-retardant power cable, a filling component is provided between two adjacent first protective components and the outer sheath, and the material of the filling component is polypropylene.

[0017] In the above-mentioned expandable multi-core fire-resistant and flame-retardant power cable, the conductor is made of copper or aluminum or copper alloy or aluminum alloy.

[0018] This application has the following beneficial effects: 1. The first protection component and the second protection component can be infinitely expanded, which can increase the power transmission capacity of the cable.

[0019] 2. After the cable has been laid, it can be expanded as needed later without the need to re-lay it, which improves the convenience of cable laying and reduces laying costs.

[0020] 3. The first protection component and the second protection component are mutually clamped and fixed, which is convenient for construction, and there is no need to destroy the first protection component and the second protection component when taking out or expanding the electrical unit.

[0021] 4. The first protection component and the second protection component can be recycled and reused, saving resources and protecting the environment.

[0022] 5. Two first electrical units in each first cavity are separated by two layers of first protection strips, and two first electrical units in two adjacent first cavities are separated by two second protection strips and one first protection strip, so as to provide better protection for the first electrical units.

[0023] 6. There is a gap between the second electrical unit protective layer and the inner protective layer in the second electrical unit, which improves the impact resistance and heat dissipation performance of the second electrical unit.

[0024] 7. When a reinforcing component is provided in the gap, the compressive resistance of the second electrical unit is improved.

[0025] 8. The electric unit cavity outside the first electric unit is triangular in shape, with a more stable structure and better anti-extrusion capability. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the three-dimensional structure of a section of Example 1 of the present invention.

[0027] Figure 2 It is a front view of embodiment 1 of the present invention.

[0028] Figure 3 It is a front view of the first protective component of Example 1 of the present invention.

[0029] Figure 4 It is a front view of the second protective component of Example 1 of the present invention.

[0030] Figure 5 It is a schematic diagram of the three-dimensional structure of a section of the second electrical unit according to Example 1 of the present invention.

[0031] Figure 6 This is a front view of the second electrical unit according to the first embodiment of the present invention.

[0032] Figure 7 It is a schematic diagram of the three-dimensional structure of a section of the second electrical unit of Example 2 of the present invention.

[0033] Figure 8 This is a front view of the second electrical unit of Example 2 of the present invention.

[0034] Fig. 9 It is a front view of embodiment 3 of the present invention.

[0035] In the figure: 1. outer protective layer, 2. filling component, 3. first protective component, 31. first protective strip, 32. first opening, 33. first cavity, 34. first supporting component, 4. second electrical unit, 41. second electrical unit protective layer, 42. gap, 43. inner protective layer, 44. conductor, 45. reinforcing component, 5. second protective component, 51. second protective strip, 52. second opening, 53. second cavity, 54. second supporting component, 6. first electrical unit. DETAILED DESCRIPTION

[0036] Example 1: Figures 1 to 6 , an expandable multi-core fire-retardant power cable, having six first electrical units 6 and an outer sheath 1, and also having three first protection components 3 and one second protection component 5; The first protection component 3 is composed of six first protection strips 31 and three first support components 34. The six first protection strips 31 form a first regular hexagon. The three first support components 34 are located in the first regular hexagon. One end of the three first support components 34 is connected to the center of the first regular hexagon. The angle between two adjacent first support components 34 is 120°. The other ends of the three first support components 34 are respectively connected to a corner of the corresponding first regular hexagon. A first opening 32 is provided at the corner of the first regular hexagon that is not connected to the first support component 34. A rhombus-shaped first cavity 33 is formed between two adjacent first support components 34 and the corresponding two first protection strips 31. The second protection component 5 is composed of six second protection strips 51 and three second support components 54. The six second protection strips 51 form a second regular hexagon. The three second support components 54 are located in the second regular hexagon. One end of the three second support components 54 is connected to the center of the second regular hexagon. The angle between two adjacent second support components 54 is 120°. The other ends of the three second support components 54 are respectively connected to a corner of the corresponding second regular hexagon. A second opening 52 is provided at the corner of the second regular hexagon that is not connected to the second support component 54. A diamond-shaped second cavity 53 is formed between two adjacent second support components 54 and the corresponding two second protection strips 51. The first opening 32 of the lower first protection component 3 and the first openings 32 of the upper two first protection components 3 point to a common center, the adjacent first protection strips 31 of any two adjacent first protection components 3 overlap and stick to each other, and the three first openings 32 point to the common center of the three first protection components 3, the three second support components 54 of the second protection component 5 are respectively inserted into the corresponding first openings 32, the two second protection strips 51 connected to the second support components 54 are located in the corresponding first cavities 33, the second protection strips 51 are respectively stuck to the corresponding first support components 34, and the ends of the second protection strips 51 that are not connected to the second support components 54 are respectively against the corresponding first protection strips 31; The second supporting member 54 divides the corresponding first cavity 33 into two electrical unit cavities, one of which is provided with a first electrical unit 6, and the other first cavity 33 is provided with a second electrical unit 4; The second electrical unit 4 is composed of a second electrical unit sheath 41, two inner sheaths 43 and two conductors 44. The second electrical unit sheath 41 is in a rhombus shape, and the two obtuse angles of the second electrical unit sheath 41 are recessed toward the center of the rhombus. The two inner sheaths 43 are located in the second electrical unit sheath 41 and are respectively located on both sides of the recess. The left inner sheath 43 is connected to the recess on the upper side, and the right inner sheath 43 is connected to the recess on the lower side. A gap 42 in the shape of ∽ is formed between the two inner sheaths 43 and the second electrical unit sheath 41, and the conductors 44 are respectively located in the corresponding inner sheaths 43. The two acute angles of the second electrical unit sheath 41 are stuck in the two acute angles of the corresponding first cavity 33, and the four side walls of the second electrical unit sheath 41 are respectively attached to the four inner walls of the corresponding first cavity 33; A filling component 2 is provided between two adjacent first protective components 3 and the outer protective layer 1 .

[0037] Example 2: Figure 7 and Figure 8 , and refer to Figures 1 to 4 , an expandable multi-core fire-retardant power cable, this embodiment is basically the same as embodiment 1, except that a reinforcing component 45 is provided in the gap 42 for protecting the inner sheath 43 and the conductor 44.

[0038] Example 3: Fig. 9 , and refer to Figures 3 to 6 , an expandable multi-core fire-retardant power cable, having fifteen first protection components 3 and ten second protection components 5, from bottom to top, the fifteen first protection components 3 are distributed in five layers, the first layer has one first protection component 3, the second layer has two first protection components 3, the third layer has three first protection components 3, the fourth layer has four first protection components 3, and the fifth layer has five first protection components 3; The first protection component 3 is composed of six first protection strips 31 and three first support components 34. The six first protection strips 31 form a first regular hexagon. The three first support components 34 are located in the first regular hexagon. One end of the three first support components 34 is connected to the center of the first regular hexagon. The angle between two adjacent first support components 34 is 120°. The other ends of the three first support components 34 are respectively connected to a corner of the corresponding first regular hexagon. A first opening 32 is provided at the corner of the first regular hexagon that is not connected to the first support component 34. A rhombus-shaped first cavity 33 is formed between two adjacent first support components 34 and the corresponding two first protection strips 31. The second protection component 5 is composed of six second protection strips 51 and three second support components 54. The six second protection strips 51 form a second regular hexagon. The three second support components 54 are located in the second regular hexagon. One end of the three second support components 54 is connected to the center of the second regular hexagon. The angle between two adjacent second support components 54 is 120°. The other ends of the three second support components 54 are respectively connected to a corner of the corresponding second regular hexagon. A second opening 52 is provided at the corner of the second regular hexagon that is not connected to the second support component 54. A diamond-shaped second cavity 53 is formed between two adjacent second support components 54 and the corresponding two second protection strips 51. The first opening 32 of a first protective component 3 of the next layer and the first openings 32 of two first protective components 3 of the previous layer adjacent thereto point to a common center, the two first protective strips 31 on the upper side of a first protective component 3 of the next layer overlap with the corresponding first protective strips 31 of two adjacent first protective components 3 of the previous layer respectively, and the adjacent first protective strips 31 of two adjacent first protective components 3 of the same layer overlap with each other; The first protective component 3 of the next layer and the corresponding two first protective components 3 of the previous layer are fixed by a second protective component 5, and the three second supporting components 54 of the second protective component 5 are respectively inserted into the corresponding first openings 32 pointing to the common center, and the two second protective strips 51 connected to the second supporting components 54 are located in the corresponding first cavities 33, and the second protective strips 51 are respectively attached to the corresponding first supporting components 34, and the ends of the second protective strips 51 that are not connected to the second supporting components 54 are respectively against the corresponding first protective strips 31; The second supporting member 54 divides the corresponding first cavity 33 into two electrical unit cavities, one of which is provided with a first electrical unit 6, and the other first cavity 33 is provided with a second electrical unit 4; The second electrical unit 4 is composed of a second electrical unit sheath 41, two inner sheaths 43 and two conductors 44. The second electrical unit sheath 41 is rhombus-shaped, and the two obtuse angles of the second electrical unit sheath 41 are recessed toward the center. The two inner sheaths 43 are located in the second electrical unit sheath 41 and are respectively located on both sides of the recess. The left inner sheath 43 is connected to the recess on the upper side, and the right inner sheath 43 is connected to the recess on the lower side. A gap 42 in the shape of ∽ is formed between the two inner sheaths 43 and the second electrical unit sheath 41, and the conductors 44 are respectively located in the corresponding inner sheaths 43. The two acute angles of the second electrical unit sheath 41 are stuck in the two acute angles of the corresponding first cavity 33 , and the four side walls of the second electrical unit sheath 41 are respectively attached to the four inner walls of the corresponding first cavity 33 .

[0039] In the above-mentioned expandable multi-core fire-retardant power cable, the material of the first protective component 3 is cross-linked polyethylene.

[0040] In the above-mentioned expandable multi-core fire-retardant power cable, the material of the second protective component 5 is cross-linked polyethylene.

[0041] In the expandable multi-core fire-resistant and flame-retardant power cable described above, the first electrical unit 6 is composed of a conductor 44 and an insulating layer extruded outside the conductor 44 .

[0042] In the above-mentioned expandable multi-core fire-resistant and flame-retardant power cable, the material of the second electrical unit sheath 41 is insulating material.

[0043] In the above-mentioned expandable multi-core fire-retardant power cable, the material of the outer sheath 1 is plastic, preferably plastic with fire-retardant function.

[0044] In the above-mentioned expandable multi-core fire-retardant power cable, the material of the filling component 2 is polypropylene.

[0045] In the above-mentioned expandable multi-core fire-resistant and flame-retardant power cable, the reinforcing component 45 is a steel belt.

[0046] This application has the following beneficial effects: 1. The first protection component 3 and the second protection component 5 can be infinitely expanded, which can increase the power transmission capacity of the cable.

[0047] 2. After the cable has been laid, it can be expanded as needed later without the need to re-lay it, which improves the convenience of cable laying and reduces laying costs.

[0048] 3. The first protection component 3 and the second protection component 5 are mutually clamped and fixed, which is convenient for construction, and there is no need to destroy the first protection component 3 and the second protection component 5 when taking out or expanding the electrical unit.

[0049] 4. The first protection component 3 and the second protection component 5 can be recycled and reused, saving resources and protecting the environment.

[0050] 5. The two first electrical units 6 in each first cavity 33 are separated by two layers of first protective strips 31 , and the two first electrical units 6 in two adjacent first cavities 33 are separated by two second protective strips 51 and one first protective strip 31 , which provide better protection for the first electrical units 6 .

[0051] 6. There is a gap 42 between the second electrical unit protective layer 41 and the inner protective layer 43 in the second electrical unit 4, which improves the impact resistance and heat dissipation performance of the second electrical unit 4.

[0052] 7. When a reinforcing component 45 is provided in the gap 42, the compression resistance of the second electrical unit 4 is improved.

[0053] 8. The electric unit cavity outside the first electric unit 6 is triangular in shape, with a more stable structure and better anti-extrusion capability.

[0054] 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 expandable multi-core fire-retardant power cable, comprising an outer sheath, a plurality of first electrical units (6), characterized in that: It also has (n+1)(n+2) / 2 first protection components (3) and n(n+1) / 2 second protection components (5), n≥1, all the first protection components (3) are distributed in n layers, and from bottom to top, the number of the first protection components (3) in the nth layer is n; The first protective component (3) of the next layer and the corresponding two adjacent first protective components (3) of the previous layer are fixed via a second protective component (5), and the first electrical unit (6) is located inside the first protective component (3); The outer protective layer is located outside the first protective component and the second protective component; the material of the outer protective layer is plastic with fire retardant function.

2. An expandable multi-core fire-retardant power cable according to claim 1, characterized in that: The first protection component (3) is composed of six first protection strips (31) and three first support components (34), the six first protection strips (31) enclose a first regular hexagon, the three first support components (34) are located in the first regular hexagon, one end of the three first support components (34) is connected to the center of the first regular hexagon, the angle between two adjacent first support components (34) is 120°, the other ends of the three first support components (34) are respectively connected to a corner of the corresponding first regular hexagon, a first opening (32) is provided at the corner of the first regular hexagon that is not connected to the first support component (34), and a rhombus-shaped first cavity (33) is formed between two adjacent first support components (34) and the corresponding two first protection strips (31); The second protection component (5) is composed of six second protection strips (51) and three second support components (54), the six second protection strips (51) enclose a second regular hexagon, the three second support components (54) are located in the second regular hexagon, one end of the three second support components (54) is connected to the center of the second regular hexagon, the angle between two adjacent second support components (54) is 120°, the other ends of the three second support components (54) are respectively connected to a corner of the corresponding second regular hexagon, a second opening (52) is provided at the corner of the second regular hexagon that is not connected to the second support component (54), and a rhombus-shaped second cavity (53) is formed between two adjacent second support components (54) and the corresponding two second protection strips (51); The first opening (32) of a first protective component (3) of a lower layer and the first openings (32) of two first protective components (3) of an upper layer adjacent thereto point to a common center, the two first protective strips (31) on the upper side of a first protective component (3) of the lower layer respectively overlap with the corresponding first protective strips (31) of two adjacent first protective components (3) of the upper layer, and the adjacent first protective strips (31) of two adjacent first protective components (3) of the same layer overlap with each other; The three second supporting parts (54) of the second protective part (5) are respectively inserted into the corresponding first openings (32) pointing to the common center, the two second protective strips (51) connected to the second supporting parts (54) are located in the corresponding first cavities (33), the second protective strips (51) are respectively attached to the corresponding first supporting parts (34), and the ends of the second protective strips (51) not connected to the second supporting parts (54) are respectively against the corresponding first protective strips (31); The second supporting component (54) divides the corresponding first cavity (33) into two electrical unit cavities, one electrical unit (6) being arranged in the electrical unit cavity, and one second electrical unit (4) being arranged in the remaining first cavity (33).

3. An expandable multi-core fire-retardant power cable according to claim 2, characterized in that: The second electrical unit (4) is composed of a second electrical unit protective layer (41), two inner protective layers (43) and two conductors (44). The second electrical unit protective layer (41) is rhombus-shaped. The two obtuse angles of the second electrical unit protective layer (41) are recessed toward the center. The two inner protective layers (43) are located in the second electrical unit protective layer (41) and are respectively located on both sides of the recessed part. The left inner protective layer (43) is connected to the recessed part on the upper side, and the right inner protective layer (43) is connected to the recessed part on the lower side. A gap (42) in the shape of ∽ is formed between the two inner protective layers (43) and the second electrical unit protective layer (41). The conductors (44) are respectively located in the corresponding inner protective layers (43).

4. An expandable multi-core fire-retardant power cable according to claim 3, characterized in that: The two acute angles of the second electrical unit protective layer (41) are clamped in the two acute angles of the corresponding first cavity (33), and the four side walls of the second electrical unit protective layer (41) are respectively attached to the four inner walls of the corresponding first cavity (33).

5. An expandable multi-core fire-retardant power cable according to claim 4, characterized in that: The material of the first protective component (3) and the second protective component (5) is cross-linked polyethylene.

6. An expandable multi-core fire-retardant power cable according to claim 5, characterized in that: The first electrical unit (6) is composed of a conductor (44) and an insulating layer extruded outside the conductor (44).

7. An expandable multi-core fire-retardant power cable according to claim 6, characterized in that: The material of the second electrical unit sheath (41) is insulating material.

8. An expandable multi-core fire-retardant power cable according to claim 7, characterized in that: The reinforcing member (45) is a steel belt.

9. An expandable multi-core fire-retardant power cable according to claim 8, characterized in that: All first protective components (3) and second protective components (5) are provided with an outer protective layer (1).

10. An expandable multi-core fire-retardant power cable according to claim 9, characterized in that: The material of the conductor (44) is copper or aluminum or a copper alloy or an aluminum alloy.

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