CN211879116U - Multi-core direct current submarine cable - Google Patents
Multi-core direct current submarine cable Download PDFInfo
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- CN211879116U CN211879116U CN202020799333.6U CN202020799333U CN211879116U CN 211879116 U CN211879116 U CN 211879116U CN 202020799333 U CN202020799333 U CN 202020799333U CN 211879116 U CN211879116 U CN 211879116U
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Abstract
The utility model provides a multi-core direct current submarine cable, which comprises two same polarity electrical units, an additional electrical unit component, a plurality of optical units, a plurality of filling strips, a belting, a cushion layer, an armor layer and an outer protective layer, wherein the outer diameter of the cross section of the additional electrical unit component is the same as that of the polarity electrical units; the two polarity electric units and the additional electric unit assembly are twisted together, and a wrapping belt, a cushion layer, an armor layer and an outer protective layer are sequentially wrapped outside the two polarity electric units; the plurality of optical units are arranged in gaps among the two polar electric units, the additional electric unit assembly and the wrapping tape; and a plurality of filling strips are arranged in gaps among the two polar electric units, the additional electric unit assembly and the wrapping tape. The multi-core direct current submarine cable has better market value, is favorable for saving laying cost and laying time, and can effectively solve the problem of roundness of electric units with different outer diameters.
Description
Technical Field
The utility model relates to a submarine cable technical field, more accurate saying so relates to a multicore direct current submarine cable.
Background
The direct current submarine cable is suitable for being connected with current conversion equipment at two ends of a direct current transmission system, a complete underwater or land transmission line system is built by matching submarine cable accessories, the direct current submarine cable is frequently used in large-capacity and long-distance transmission projects, the section of a required conductor is large, and therefore the direct current submarine cable in the prior art is mainly designed into a single-core submarine cable structure. The submarine cable in the prior art adopts a large-section single-core structure, so that the engineering cost is high, the period is long, and the total cost is high. In addition, single core direct current submarine cable need pack the optical unit in the armor when compound optical fiber, or increase the optic fibre filling layer alone, places and has increased the impaired risk of optic fibre unit in the armor, increases the optic fibre filling layer alone and can additionally increase direct current submarine cable raw and other materials cost to owing to increase thermal insulation material and reduce submarine cable transport capacity.
In general, a pseudo-bipolar direct-current submarine cable power transmission system is a loop formed by two polar direct-current submarine cables, and once one of the two polar direct-current submarine cables fails, the whole loop cannot normally operate; a backflow submarine cable is added in a true bipolar direct-current submarine cable power transmission system, three submarine cables form a loop, when a certain polar submarine cable fails, an intact polar submarine cable can form the loop by means of the backflow submarine cable, and half of transmission capacity is kept. At present, in order to avoid the problem that the whole system stops running after one of two polarity submarine cables of a pseudo-bipolar system fails, a solution scheme of additionally adding a standby polarity submarine cable is adopted, so that the original polarity submarine cable is switched to the standby submarine cable to form a loop again after one of the two polarity submarine cables fails.
SUMMERY OF THE UTILITY MODEL
In view of this, the main object of the utility model is to provide a multicore direct current submarine cable adopts two the same polarity electrical unit and the integrative stranding of additional electrical unit subassembly and system the structure of armor, and additional electrical unit subassembly cross-section external diameter is the same with polarity electrical unit cross-section external diameter, and sets up the filler strip between inside polarity electrical unit and the additional electrical unit subassembly, reduces material cost and lays the cost, guarantees the rounding degree of the different sinle silk stranding of size simultaneously.
In order to achieve the above object, the present invention provides a multi-core dc submarine cable, which comprises two same polarity electrical units, an additional electrical unit assembly, a plurality of optical units, a plurality of filler strips, a tape, a cushion layer, an armor layer, and an outer protective layer, wherein the outer diameter of the cross section of the additional electrical unit assembly is the same as the outer diameter of the cross section of the polarity electrical unit; the two polar electric units and the additional electric unit assembly are twisted together, and the wrapping belt, the cushion layer, the armor layer and the outer protective layer are sequentially wrapped outside the polar electric units and the additional electric unit assembly; a plurality of the optical units are arranged in the gaps among the two polar electric units, the additional electric unit assembly and the wrapping tape; and a plurality of filling strips are arranged in the gap between the two polar electric units, the additional electric unit assembly and the wrapping tape.
Preferably, the additional electrical unit assembly comprises an additional electrical unit and at least one additional filler strip disposed at a side of the additional electrical unit.
Preferably, the additional electrical unit assembly comprises two semicircular additional filler strips, the two additional filler strips are arranged on two sides of the additional electrical unit, and the two additional filler strips form a near-circumference shape.
Preferably, two additional filler strips are matched with the additional electric units to form a circumference, and gaps are reserved at the upper end and the lower end of the circumference.
Preferably, the additional filler strip is located on a side of the additional electrical unit remote from both of the polar electrical units or between the additional electrical unit and both of the polar electrical units.
Preferably, when the multi-core dc submarine cable is applied to a pseudo-bipolar dc transmission system, and the transmission capacity of the additional electrical unit assembly and the transmission capacity of the polar electrical unit assembly are required to be the same, the additional electrical unit assembly comprises an additional electrical unit with the same structure as the polar electrical unit, and the cross-sectional area of the conductor of the additional electrical unit is the same as that of the polar electrical unit.
Preferably, when the multi-core direct current submarine cable is applied to a true bipolar direct current transmission system, the additional electrical unit assembly comprises an additional electrical unit which has the same structure as the polarity electrical unit, and the conductor cross-sectional area of the additional electrical unit is the same as that of the polarity electrical unit.
Preferably, the additional electrical unit assembly comprises three cabled additional electrical units, and a filling bar is arranged inside the additional electrical units.
Preferably, the polarity electrical unit comprises a conductor, an inner semi-conductive shielding layer, an extruded insulating layer, an outer semi-conductive shielding layer, a semi-conductive water-blocking layer, a metal shielding layer and a plastic protective layer which are sequentially wrapped from inside to outside.
Compared with the prior art, the utility model discloses a multicore direct current submarine cable and transposition device's advantage lies in: the multi-core direct current submarine cable obviously saves the required raw material investment under the design of the same conductor section and insulation structure, and has better market value; the multi-core direct-current submarine cable is beneficial to finishing one-time laying of a single-loop direct-current submarine cable line in the construction process of a submarine cable project, and a large amount of laying cost and laying time are saved; the multi-core direct current submarine cable can effectively solve the roundness problem of the electric units with different outer diameters.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic cross-sectional view of a multi-core dc submarine cable according to the present invention.
Fig. 2 is a schematic cross-sectional view of a polarity electrical unit of a multi-core dc submarine cable according to the present invention.
Fig. 3 is a schematic cross-sectional view of an additional electrical unit assembly of the multi-core dc submarine cable according to the present invention.
Fig. 4 is a schematic cross-sectional view of a first variant of the multi-core dc submarine cable according to the present invention.
Fig. 5 is a schematic cross-sectional view of a second variant of the multi-core dc submarine cable according to the present invention.
Fig. 6 is a schematic cross-sectional view of a third variant of the multi-core dc submarine cable according to the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
As shown in fig. 1, the multi-core dc submarine cable of the present invention includes two same polarity electrical units 11, 12, an additional electrical unit assembly 13, a plurality of optical units 14, a plurality of filler strips 15, a band 161, a cushion layer 162, an armor layer 163, and an outer sheath 164. Wherein, the section outer diameter of the additional electric unit assembly 13 is the same as that of the polar electric units 11 and 12, so as to improve the roundness after cabling. The two polar electric units 11 and 12 are twisted together with the additional electric unit assembly 13, and the wrapping tape 161, the cushion layer 162, the armor layer 163 and the outer protective layer 164 are sequentially wrapped outside. The plurality of light units 14 are disposed in the gaps between the two polar electric units 11, 12, the additional electric unit assembly 13 and the tape 161, and the gaps between the two polar electric units 11, 12, the additional electric unit assembly 13 and the tape 161 are filled with a plurality of filling strips 15.
As shown in fig. 2, the polarity electrical unit 11 includes a conductor 111, an inner semi-conductive shielding layer 112, an extrusion insulation layer 113, an outer semi-conductive shielding layer 114, a semi-conductive water blocking layer 115, a metal shielding layer 116, and a plastic sheath layer 117, which are sequentially wrapped from inside to outside. The polarity electrical unit 12 is the same size as the polarity electrical unit 11. The main functions of the polarity electrical units 11 and 12 are to form a dc power transmission circuit, to play a role in transmitting electric energy in a normal operation state, and to put the additional electrical unit assembly 13 in an inoperative state when the polarity electrical units 11 and 12 are in a normal operation state.
The additional electrical unit assembly 13 includes an additional electrical unit 131. In the true bipolar direct current transmission system, the main function of the additional electric unit 131 is to undertake the reflux current for one of the polarity electric units after the other polarity electric unit fails, the utility model relates to a conductor sectional area (marked as S) of the additional electric unit 131Attachment(s)) Cross section of conductor with polar electric unit (denoted as S)Polarity) Same, i.e. SAttachment(s)＝SPolarity. Preferably the thickness of the insulating layer of the additional electrical unit (denoted d)Attachment(s)) Thickness of insulating layer for polar electric unit (denoted as d)Polarity) 30% of (i), i.e. dAttachment(s)＝30％×dPolarity. In a pseudo-bipolar system, the main function of the additional electrical unit 131 is to re-loop with one polarity electrical unit after the other polarity electrical unit fails to ensure that the system can operate normally, where the conductor cross-section area and the insulation layer thickness of the additional electrical unit 131 are designed according to the level of the transport capacity that the additional electrical unit needs to retain, and when the transport capacity that the additional electrical unit 131 can reach is the same as that of the polarity electrical unit, S is the sameAttachment(s)＝SPolarityWhile d isAttachment(s)＝dPolarityAt this time, the structural composition and size of the additional electric unit are completely consistent with those of the polarity electric unit.
In a pseudo-bipolar system, when the system sets the level of the transport capacity reserved by the additional electrical unit 131 to be smaller than the level of the transport capacity of the polarity electrical units 11, 12, the additional electrical unit 131 is not in accordance with the size of the polarity electrical units 11, 12, and the additional assembly 131 needs to add an additional filler strip to keep the outer diameter of the cross section of the additional electrical unit assembly 13 the same as the outer diameter of the cross section of the polarity electrical units 11, 12. As shown in fig. 3, the additional electrical unit assembly 13 includes two semicircular additional filler strips 132. Two additional filler strips 132 are arranged at two sides of the additional electric unit 131, the two additional filler strips 132 form an approximate circumference shape, D shown in fig. 3 is an approximate circumference outer diameter, and D is the same as the outer diameter of the polar electric units 11 and 12, so that the roundness of the submarine cable covered by the submarine cable after cabling is improved by matching the two polar electric units. In order to make the two additional filler strips 132 still have deformation margin after combination, the two additional filler strips 132 are designed to form a circumference together with the additional electrical unit 131, and then a certain gap is left at each of the upper and lower ends, i.e. d in fig. 3, preferably d is 10 mm. In order to avoid the deformation of the additional electric unit 131 caused by the excessive tightening pressure generated by the two additional filling bars 132 on the additional electric unit 131 during the twisting process, the inner side radian of the additional filling bars 132 is designed according to the outer diameter of the additional electric unit 131, and the fitting angle alpha between the inner 132 radian of the two additional filling bars and the outer diameter of the additional electric unit 131 is 120 degrees.
As shown in fig. 4, for the first variant of the multi-core dc submarine cable of the present invention, the difference point is that the additional electrical unit assembly 13A includes the additional electrical unit 131A and the additional filler strip 132A, the additional filler strip 132A is located at one side of the additional electrical unit 131A away from the polarity electrical units 11 and 12, the additional electrical unit 131A contacts with the additional filler strip 132A and the two polarity electrical units 11 and 12, the three-point action is stable in position, there is no mandatory requirement for the contact area and angle between the filler strip and the additional electrical unit 131A, both sides of the additional filler strip 132A are required to be compressed below by the filler strip 15 close to, and it is ensured that there is no large displacement. This variant simplifies the construction of the additional electrical unit assembly, using a single-sided filler strip instead of two semicircular combined filler strips to improve overall cabling roundness.
As shown in fig. 5, for the second variant of the multi-core dc submarine cable of the present invention, the difference point is that the additional electrical unit assembly 13B includes an additional electrical unit 131B and an additional filler strip 132B, the additional filler strip 132B is located between the additional electrical unit 131B and the polar electrical units 11 and 12, and both sides of the additional filler strip 132B are required to be compressed below by the adjacent filler strip 15, so as to ensure that there is no large displacement. The structure of the additional electric unit assembly is simplified through the variation, and the gravity center of the submarine cable is closer to the geometric center after cabling, so that the operation of later-stage storage and construction process is facilitated.
As shown in fig. 6, for the third variant of the multi-core dc submarine cable of the present invention, the difference lies in that the additional electrical unit assembly 13C is a three-core pre-cabling structure, the additional electrical unit assembly 13C includes three additional electrical units 131C after cabling, and the filling bar 132C is disposed inside the additional electrical unit assembly, and then the additional electrical unit assembly 13C performs secondary cabling with the two polarity electrical units 11 and 12 again. The sum of the conductor cross sections of the three additional electrical units 131C is the same as the conductor cross sections of the polarity electrical units 11, 12. A number of optical units 133C may also be added within the additional electrical unit assembly 13C, thereby increasing the fiber monitoring and communication channels. According to the variation, the independent additional electric unit is divided into three independent electric units, then the number of the access cores can be flexibly controlled by matching with a power transmission system, the load capacity of the additional electric unit is adjusted according to needs, and the adjustment is more flexible and convenient.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (9)
1. A multi-core direct current submarine cable is characterized by comprising two same polarity electrical units, an additional electrical unit assembly, a plurality of optical units, a plurality of filling strips, a wrapping tape, a cushion layer, an armor layer and an outer protective layer, wherein the outer diameter of the cross section of the additional electrical unit assembly is the same as that of the cross section of each polarity electrical unit; the two polar electric units and the additional electric unit assembly are twisted together, and the wrapping belt, the cushion layer, the armor layer and the outer protective layer are sequentially wrapped outside the polar electric units and the additional electric unit assembly; a plurality of the optical units are arranged in the gaps among the two polar electric units, the additional electric unit assembly and the wrapping tape; and a plurality of filling strips are arranged in the gap between the two polar electric units, the additional electric unit assembly and the wrapping tape.
2. The multi-core direct current submarine cable according to claim 1, wherein said additional electrical unit assembly comprises an additional electrical unit and at least one additional filler strip disposed at a side of said additional electrical unit.
3. The multi-core dc submarine cable according to claim 2, wherein said additional electrical unit assembly comprises two semi-circular additional filler strips, two of said additional filler strips being arranged on either side of said additional electrical unit, two of said additional filler strips forming a near-circumferential shape.
4. The multi-core dc submarine cable according to claim 3, wherein two of said additional filler strips form a circumference with said additional electrical unit and have gaps at upper and lower ends thereof.
5. The multi-core dc submarine cable according to claim 2, wherein said additional filler strip is located at a side of said additional electrical unit remote from both of said polar electrical units or between said additional electrical unit and both of said polar electrical units.
6. The multi-core dc submarine cable according to claim 1, wherein, when said multi-core dc submarine cable is used in a pseudo-bipolar dc power transmission system and it is required that said additional electrical cell assembly has the same transport capacity as said polar electrical cell assembly, said additional electrical cell assembly comprises additional electrical cells having the same structure as said polar electrical cells, and the cross-sectional conductor area of said additional electrical cells is the same as the cross-sectional conductor area of said polar electrical cells.
7. The multi-core direct current submarine cable according to claim 1, wherein, when said multi-core direct current submarine cable is applied in a true bipolar direct current transmission system, said additional electrical unit assembly comprises additional electrical units having the same structure as said polar electrical units, and wherein the conductor cross-sectional area of said additional electrical units is the same as the conductor cross-sectional area of said polar electrical units.
8. The multi-core dc submarine cable according to claim 1, wherein said additional electrical unit assembly comprises three cabled additional electrical units, and wherein filler strips are provided inside.
9. The multi-core direct current submarine cable according to claim 1, wherein the polar electric unit comprises a conductor, an inner semi-conductive shielding layer, an extrusion insulating layer, an outer semi-conductive shielding layer, a semi-conductive water-blocking layer, a metal shielding layer and a plastic sheath layer which are sequentially wrapped from inside to outside.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020799333.6U CN211879116U (en) | 2020-05-14 | 2020-05-14 | Multi-core direct current submarine cable |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020799333.6U CN211879116U (en) | 2020-05-14 | 2020-05-14 | Multi-core direct current submarine cable |
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| CN211879116U true CN211879116U (en) | 2020-11-06 |
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| CN202020799333.6U Active CN211879116U (en) | 2020-05-14 | 2020-05-14 | Multi-core direct current submarine cable |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111816361A (en) * | 2020-07-17 | 2020-10-23 | 东莞市民兴电缆有限公司 | Waterproof multicore electric power transmission & distribution cable of degree of depth |
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2020
- 2020-05-14 CN CN202020799333.6U patent/CN211879116U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111816361A (en) * | 2020-07-17 | 2020-10-23 | 东莞市民兴电缆有限公司 | Waterproof multicore electric power transmission & distribution cable of degree of depth |
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Address after: 226000 No. 1 South Road, Nantong economic and Technological Development Zone, Jiangsu, China Patentee after: Zhongtian Technology submarine cable Co., Ltd Address before: 226000 No. 1 South Road, Nantong economic and Technological Development Zone, Jiangsu, China Patentee before: ZHONGTAN TECHNOLOGY SUBMARINE CABLE Co.,Ltd. |
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| CP01 | Change in the name or title of a patent holder |