CN118213127A - Submarine cable manufacturing method and submarine cable - Google Patents

Abstract

The application belongs to the technical field of submarine cables, and provides a submarine cable manufacturing method and a submarine cable. The submarine cable manufacturing method comprises the following steps: twisting once by using a frame twisting machine so as to twist the central line of the submarine cable, the first conductor layer and the optical fiber conducting layer; and (3) performing secondary twisting by using a frame twisting machine to twist the second conductor layer of the submarine cable, wherein the frame twisting machine with the same specification is used for primary twisting and secondary twisting. The sea cable manufacturing method provided by the application can be used for manufacturing the sea cable with larger sectional area by using the frame stranding machine with the existing specification, so that the cost for increasing the sectional area of the sea cable is smaller.

Description

Submarine cable manufacturing method and submarine cable

Technical Field

The application relates to the technical field of submarine cables, in particular to a submarine cable manufacturing method and a submarine cable.

Background

With the rapid development of offshore wind power technology, the requirements of offshore wind power equipment on the transmission current-carrying capacity of the offshore cable are gradually increased.

As the current-carrying capacity of the submarine cable increases, the cross-sectional area of the submarine cable also increases. The sea cable is produced through the frame strander, the maximum cross-sectional area of the cable that specific frame strander can prepare is fixed value, if the sea cable of bigger cross-sectional area needs to be produced, need to upgrade the frame strander and reform transform. For example, most sea cable manufacturers use 127-disc frame strander to produce sea cables, the maximum cross-sectional area of the sea cables which can be prepared by the 127-disc frame strander is 3000mm ², the 127-disc frame strander can be changed into 169-disc frame strander, and the maximum cross-sectional area of the sea cables which can be prepared by the 169-disc frame strander is 5000mm ². But the cost of upgrading and reforming the 127-disc frame strander into the 169-disc frame strander is high, so that the cost of improving the cross-sectional area of the submarine cable by upgrading and reforming the frame strander is high.

In the related art, the cost of increasing the cross section of the submarine cable is high.

Disclosure of Invention

The application provides a submarine cable manufacturing method and a submarine cable, which can use a frame stranding machine of the existing specification to manufacture a submarine cable with larger sectional area, so that the cost for increasing the sectional area of the submarine cable is smaller.

The application provides a submarine cable manufacturing method, which comprises the following steps:

Twisting once by using a frame twisting machine so as to twist the central line of the submarine cable, the first conductor layer and the optical fiber conducting layer;

and (3) performing secondary twisting by using a frame twisting machine to twist the second conductor layer of the submarine cable, wherein the frame twisting machine with the same specification is used for primary twisting and secondary twisting.

In one possible embodiment, the method for manufacturing a submarine cable provided by the application uses a frame stranding machine to carry out secondary stranding so as to twist a second conductor layer of the submarine cable, wherein the method comprises the following steps: when the second conductor layer is one layer, the sectional area of the second wire in the second conductor layer is: the cross-sectional area of the second conductor layer/the number of knots of the outermost layer of the frame strander.

In one possible embodiment, the method for manufacturing a submarine cable provided by the application uses a frame stranding machine to carry out secondary stranding so as to twist a second conductor layer of the submarine cable, wherein the method comprises the following steps: when the second conductor layer is two layers, the sectional area of the second wire in the second conductor layer is: the section area of the second conductor layer/(the number of nodes of the outermost layer of the frame strander+the number of nodes of the penultimate layer of the frame strander).

In one possible embodiment, the method for manufacturing a submarine cable provided by the application uses a frame stranding machine to carry out secondary stranding so as to twist a second conductor layer of the submarine cable, wherein the method comprises the following steps: when the second conductor layer is three layers, the sectional area of the second wire in the second conductor layer is as follows: the section area of the second conductor layer/(the number of the nodes of the outermost layer of the frame strander+the number of the nodes of the last but one layer of the frame strander).

In one possible embodiment, the method for manufacturing a submarine cable provided by the application uses a frame stranding machine to twist a center line of the submarine cable, a first conductor layer and an optical fiber conducting layer, and then comprises the following steps:

coating two layers of first water-blocking binding bands outside the optical fiber conducting layer; the centerline, the first conductor layer, and the optical fiber conductive layer are heated.

In one possible embodiment, the method for manufacturing a submarine cable provided by the application comprises the following steps of: and stripping the first water-blocking bandage of the outer layer.

The application also provides a submarine cable, which comprises a central line, a first conductor layer, an optical fiber conducting layer, a first water-blocking binding band, a second conductor layer, a second water-blocking binding band and a protective layer which are sequentially arranged from inside to outside in the radial direction of the submarine cable, wherein the first conductor layer is a plurality of layers, each layer of first conductor layer comprises a plurality of first wires which are sequentially arranged along the circumferential direction of the submarine cable, the second conductor layer is at least one layer, and each layer of second conductor layer comprises a plurality of second wires which are sequentially arranged along the circumferential direction of the submarine cable.

In one possible implementation manner, the submarine cable provided by the application has the advantages that the first conducting wire is trapezoid, the first short side of the first conducting wire faces towards the central line, the first long side of the first conducting wire faces away from the central line, and the first oblique sides of adjacent first conducting wires are abutted; the distance between the first long side and the first short side is smaller than the distance between the two first oblique sides.

In a possible implementation manner, the submarine cable provided by the application has the advantages that the second conducting wire is trapezoid, the second short side of the second conducting wire faces towards the central line, the second long side of the second conducting wire faces away from the central line, and the second oblique sides of the adjacent second conducting wires are abutted; the distance between the second long side and the second short side is smaller than the distance between the two second oblique sides.

In one possible implementation manner, the submarine cable provided by the application has a fan-shaped first conducting wire, wherein the first conducting wire comprises a first inner arc and a first outer arc, the first inner arc faces the central line, and the first outer arc faces away from the central line; the first side edges of the first wires are provided with first teeth, and the first teeth on the first side edges of the adjacent two first wires are meshed.

In one possible implementation manner, the submarine cable provided by the application has a fan-shaped second conducting wire, wherein the second conducting wire comprises a second inner arc and a second outer arc, the second inner arc faces the central line, and the second outer arc faces away from the central line; the second side of the second wire is provided with second teeth, and the second teeth on the second side of two adjacent second wires are meshed.

In one possible embodiment, the submarine cable provided by the application, the optical fiber conducting layer comprises a plurality of filling segments and a plurality of optical fibers, and the plurality of optical fibers and the plurality of filling segments are arranged at intervals along the circumferential direction of the submarine cable; the filling section comprises a first filling section and a second filling section, the first filling section is arranged on two sides of the optical fiber, and one side of the first filling section facing the optical fiber is attached to the outer wall of the optical fiber; the plurality of second filling sections are sequentially arranged along the circumferential direction on one side, away from the optical fiber, of the first filling section, a third tooth part is arranged on one side, away from the optical fiber, of the first filling section, and fourth tooth parts are arranged on two sides of the second filling section; the third tooth portion is engaged with a fourth tooth portion adjacent to the third tooth portion, and the adjacent fourth tooth portion is engaged.

In one possible implementation manner, the submarine cable provided by the application has the first water-blocking binding band which is a butt-wound bag; the second water-blocking bandage is covered and wrapped.

The sea cable manufacturing method and the sea cable provided by the application are characterized in that the sea cable manufacturing method comprises the following two steps of twisting once by using a frame twisting machine so as to twist the central line of the sea cable, the first conductor layer and the optical fiber conducting layer; and (3) performing secondary twisting by using a frame twisting machine to twist the second conductor layer of the submarine cable, wherein the frame twisting machine with the same specification is used for primary twisting and secondary twisting. When the sea cable is produced, the sea cable is divided into two strands by utilizing the frame strander with the same specification, and the larger sections in the frame strander can be used for stranding during the two strands, so that the cross section area of the sea cable can be increased on the premise of not modifying the frame strander, and the cost for increasing the cross section area of the sea cable is smaller.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions of the prior art, the following description will briefly explain the drawings used in the embodiments or the description of the prior art, and it is obvious that the drawings in the following description are some embodiments of the present application, and other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a flowchart of a submarine cable manufacturing method according to an embodiment of the present application;

Fig. 2 is a schematic structural diagram of a submarine cable manufactured by using the submarine cable manufacturing method according to the embodiment of the application;

FIG. 3 is a schematic diagram illustrating a primary twisting process in the submarine cable manufacturing method according to the embodiment of the application;

fig. 4 is a schematic diagram of a primary twisting process in the submarine cable manufacturing method according to the embodiment of the application;

FIG. 5 is a second flowchart of a submarine cable manufacturing method according to an embodiment of the present application;

FIG. 6 is a third flowchart of a submarine cable manufacturing method according to an embodiment of the present application;

fig. 7 is a schematic structural diagram of a submarine cable according to an embodiment of the present application;

fig. 8 is a schematic structural diagram of a first wire in a submarine cable according to an embodiment of the present application;

fig. 9 is a schematic structural diagram of a second wire in a submarine cable according to an embodiment of the present application;

fig. 10 is a schematic diagram of a submarine cable according to an embodiment of the present application;

fig. 11 is a schematic diagram II of a first conducting wire in a submarine cable according to an embodiment of the present application;

Fig. 12 is a schematic diagram of a second structure of a second wire in the submarine cable according to the embodiment of the application;

fig. 13 is a schematic diagram III of a submarine cable according to an embodiment of the present application;

fig. 14 is a schematic structural diagram of a submarine cable according to an embodiment of the present application;

FIG. 15 is a schematic structural diagram of an optical fiber filling layer in a submarine cable according to an embodiment of the present application;

fig. 16 is a schematic structural view of a first filling section in a submarine cable according to an embodiment of the present application;

Fig. 17 is a schematic structural diagram of a second filling section in a submarine cable according to an embodiment of the present application.

Reference numerals illustrate:

100-submarine cable; 100 a-sea cable semi-finished product; 110-center line;

120-a first conductor layer; 121-a first wire; 1211-a first short side; 1212-a first long side; 1213-a first oblique side; 1214-a first inner arc; 1215-a first outer arc; 1216-a first side; 1216 a-a first tooth;

130-an optical fiber conducting layer; 131-an optical fiber; 132-filling the segments; 1321-a first filler section; 1321 a-third teeth; 1322-a second filling section; 1322 a-fourth teeth;

140-a second conductor layer; 141-a second wire; 1411-a second short side; 1412-second long side; 1413-a second oblique side; 1414-a second inner arc; 1415-a second outer arc; 1416-a second side; 1416 a-second teeth;

150-a first water-blocking strap; 160-a second water blocking strap;

170-a protective layer;

171-PE fill layer;

172-PP inner cushion layer;

173-armoured steel wire layer;

200-frame strander;

300-a first paying-off device; 400-a first traction device; 500-a second paying-off device; 600-a second traction device; 700-a first strapping tape wrapping device; 800-a cloth stripping machine; 900-a second strapping tape wrapping device;

c1-a first layer; a C2-second layer; c3-a third layer; c4-fourth layer; c5-fifth layer; c6-sixth layer; c7-seventh layer;

C-circumferential direction; r-radial direction.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present application more apparent, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments of the present application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.

In the description of the present application, it should be noted that, unless explicitly stated and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be fixedly connected, or indirectly connected through intermediaries, for example, or may be in communication with each other between two elements or in an interaction relationship between the two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art according to the specific circumstances.

In the description of the present application, it should be understood that the terms "upper," "lower," "front," "rear," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the present application and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present application.

The terms first, second, third and the like in the description and in the claims and in the above-described figures, if any, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the application described herein may be implemented, for example, in sequences other than those illustrated or otherwise described herein.

Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or maintenance tool that comprises a list of steps or elements is not necessarily limited to those steps or elements that are expressly listed or inherent to such process, method, article, or maintenance tool.

The offshore wind power technology is rapidly developed as clean energy, and the transmission capacity of offshore wind power equipment is greatly improved along with the rapid development of the offshore wind power technology. The marine cable is used for transmitting the electric energy generated by the marine wind power equipment, and the requirements on the transmission current-carrying capacity of the marine cable are gradually increased along with the improvement of the transmission capacity of the marine wind power equipment.

As the current-carrying capacity of the submarine cable increases, the cross-sectional area of the submarine cable also increases. The sea cable is produced through the frame strander, the maximum cross-sectional area of the cable that specific frame strander can prepare is fixed value, if the sea cable of bigger cross-sectional area needs to be produced, need to upgrade the frame strander and reform transform. For example, most sea cable manufacturers use 127-disc frame strander to produce sea cables, the maximum cross-sectional area of the sea cables which can be prepared by the 127-disc frame strander is 3000mm ², the 127-disc frame strander can be changed into 169-disc frame strander, and the maximum cross-sectional area of the sea cables which can be prepared by the 169-disc frame strander is 5000mm ².

However, when the 127-disc frame strander is updated and reformed into the 169-disc frame strander, large-scale equipment reformation is needed, meanwhile, equipment also needs to be stopped and matched, the productivity is affected, and the production cost is increased, so that the cost for improving the cross section area of the submarine cable by updating and reforming the frame strander is higher.

In the related art, the cost of increasing the cross section of the submarine cable is high.

Based on the method, the sea cable manufacturing method and the sea cable are provided, the sea cable with larger cross section area can be manufactured by using the frame stranding machine with the existing specification, and the cost for increasing the cross section area of the sea cable is low.

FIG. 1 is a flowchart of a submarine cable manufacturing method according to an embodiment of the present application; fig. 2 is a schematic structural diagram of a submarine cable manufactured by using the submarine cable manufacturing method according to the embodiment of the application; FIG. 3 is a schematic diagram illustrating a primary twisting process in the submarine cable manufacturing method according to the embodiment of the application; fig. 4 is a schematic diagram of a primary twisting process in the submarine cable manufacturing method according to the embodiment of the application.

Referring to fig. 1 to 4, the submarine cable manufacturing method provided by the application comprises the following steps: twisting once using a frame twisting machine 200 to twist the center line 110 of the submarine cable 100, the first conductor layer 120, and the optical fiber conductive layer 130; the second twisting is performed using the frame twisting machine 200 to twist the second conductor layer 140 of the submarine cable 100, wherein the frame twisting machine 200 of the same specification is used for the first twisting and the second twisting.

First, the structure of the submarine cable 100 will be briefly described. With continued reference to fig. 2, submarine cable 100 includes a center line 110, a first conductor layer 120, an optical fiber conducting layer 130, and a second conductor layer 140, which are arranged in this order from the inside to the outside. The first conductor layer 120 may be a plurality of layers, each first conductor layer 120 includes a plurality of first conductive wires 121, and the second conductor layer 140 may be a plurality of layers, each second conductor layer 140 includes a plurality of second conductive wires 141. In fig. 1, four first conductor layers 120 and one second conductor layer 140 are shown. The optical fiber conductive layer 130 includes a plurality of optical fibers 131, a plurality of first filling segments 1321, and a plurality of second filling segments 1322. A first water blocking tape 150 is further disposed between the optical fiber conductive layer 130 and the second conductor layer 140, and a second water blocking tape 160 is further disposed on the outside of the second conductor layer 140.

Next, the structure of the frame strander 200 will be described using a 127-tray frame strander as an example. The value "127" in a 127-wire frame refers to the number of wires that can be twisted in the frame 200. The number of the joints of the frame strander 200 indicates the number of wires which the frame strander 200 can twist in each layer, and the sum of the number of the joints of the frame strander 200 is the number of wires which the frame strander 200 can twist.

Table 1 lists the number of knots of the skein 200 and the number of conductors per layer in the sea cable 100 corresponding to the number of knots of the skein 200. Referring to table 1 and fig. 2, the center line 110 forms a first layer C1, four first conductor layers 120 form a second layer C2, a third layer C3, a fourth layer C4, and a fifth layer C5, respectively, the optical fiber conductive layer 130 forms a sixth layer C6, the second conductor layer 140 forms a seventh layer C7, the first layer C1 includes 1 center line 110, the second layer C2 includes 6 first wires 121, the third layer C3 includes 12 first wires 121, the fourth layer C4 includes 18 first wires 121, the fifth layer C5 includes 24 first wires 121, the number of optical fibers 131, first fill segments 1321, and second fill segments 1322 in the sixth layer C6 is 30 in total, the seventh layer C7 includes 36 second wires 141, the sum of all wires in each layer is 127, and the number of wires that the 127 frame twister can twist is 127.

TABLE 1 number of knots of frame strander and number of wires per layer in submarine cable corresponding to the number of knots of frame strander

Sea cable layer number	Number of wires per layer in submarine cable	Number of frame strander sections
			C1	1	1
C2	6	6
			C3	12	12
C4	18	18
			C5	24	24
C6	30	30
			C7	36	36

With continued reference to fig. 1 and 3, the submarine cable manufacturing method includes:

S101, twisting is performed once using the frame twisting machine 200 to twist the center line 110 of the submarine cable 100, the first conductor layer 120 and the optical fiber conductive layer 130.

At the time of one twisting, the center line 110 of the sea cable 100, the plurality of first conductor layers 120, and the optical fiber conductive layer 130 are twisted by the frame twister 200. The center line 110 is the 1 st section of the frame strander 200, the first conductor layer 120 is the 6 th to 24 th sections of the frame strander 200, and the optical fiber conductive layer 130 is the 30 th section of the frame strander 200. After one twisting is completed, the center line 110, the plurality of first conductor layers 120, and the optical fiber conductive layer 130 form a submarine cable semi-finished product 100a. In addition, when one twisting is performed, the twisting directions between two adjacent first conductor layers 120 are opposite.

With continued reference to fig. 3, a first paying-off device 300 and a first drawing device 400 are further disposed at the front end of the frame strander 200 when stranding once, so that the center line 110, the plurality of first conductor layers 120 and the optical fiber conductive layer 130 maintain proper tension during stranding, wherein the first drawing device 400 may be a belt drawing device.

S102, performing secondary twisting by using the frame twisting machine 200 to twist the second conductor layer 140 of the submarine cable 100, wherein the primary twisting and the secondary twisting are the same-specification frame twisting machine 200.

The submarine cable semi-finished product 100a is put into the frame strander 200 with the same specification again, the second conductor layer 140 and the submarine cable semi-finished product 100a are stranded, and the second conductor layer 140 is used in the 36 th section of the frame strander 200. In the secondary twisting, the twisting direction of the second conductor layer 140 is opposite to the twisting direction of the optical fiber conductive layer 130.

With continued reference to fig. 4, during the secondary twisting, a second paying-off device 500 and a second traction device 600 are further disposed at the front end of the frame twisting machine 200, so that the second conductor layer 140 maintains a suitable tension during the twisting process, where the second traction device 600 may be a belt traction device.

The primary twisting and the secondary twisting use 127-disc frame twisting machines, that is, when the submarine cable 100 is produced, the frame twisting machine 200 with the same specification is utilized to divide the submarine cable 100 into two times for twisting, and when the frame twisting machine 200 is used for secondary twisting, the larger number of knots can be used for twisting, so that the cross-sectional area of the submarine cable 100 can be increased on the premise that the frame twisting machine 200 is not modified, and the cost for increasing the cross-sectional area of the submarine cable 100 is small. For example, a 127-reel frame strander may be used to produce submarine cables having a cross-sectional area greater than 3000mm ², and a 169-reel frame strander may be used to produce submarine cables having a cross-sectional area greater than 5000mm ².

The submarine cable manufacturing method provided by the embodiment of the application comprises the following two steps: s101, twisting once by using a frame twisting machine 200 to twist the central line 110, the first conductor layer 120 and the optical fiber conducting layer 130 of the submarine cable 100; s102, performing secondary twisting by using the frame twisting machine 200 to twist the second conductor layer 140 of the submarine cable 100, wherein the frame twisting machine 200 with the same specification is used for the primary twisting and the secondary twisting. When the submarine cable 100 is produced, the submarine cable 100 is twisted twice by utilizing the frame strander 200 with the same specification, and the larger number of joints in the frame strander 200 can be used for twisting during secondary twisting, so that the cross-sectional area of the submarine cable 100 can be increased on the premise of not modifying the frame strander 200, and the cost for increasing the cross-sectional area of the submarine cable 100 is smaller.

When secondary twisting is performed, the sectional area of the twisted wire required for secondary twisting needs to be calculated in advance. Since the maximum number of knots of the frame twisting machine 200 may have been used at the time of the primary twisting, the sectional area of the second wire 141 needs to be larger than that of the first wire 121 in order to make the second wires 141 in the second conductor layer 140 closely contact with each other at the time of the secondary twisting, and thus, the sectional area of the second wire 141 needs to be calculated. The cross-sectional area of the second wire 141 can be calculated by the cross-section of the submarine cable semi-finished product 100a and the number of knots of the frame strander.

In the first embodiment, when the second conductor layer 140 is one layer, the cross-sectional area of the second wire 141 in the second conductor layer 140 is: the cross-sectional area of the second conductor layer 140/the number of knots of the outermost layer of the frame strander 200.

Specifically, in the submarine cable 100 shown in fig. 2, the second conductor layer 140 is one layer, and the second conductor layer 140 may be twisted by using the number of the outermost nodes of the frame twisting machine 200, for example, in a 127-disc frame twisting machine, the number of the outermost nodes is 36 nodes.

First, the cross-sectional area of the second conductor layer 140 is calculated, after the primary twisting is completed, the cross-sectional area of the submarine cable 100 is represented by S1, after the secondary twisting, the preset cross-sectional area of the submarine cable 100 is represented by S2, and the cross-sectional area of the second conductor layer 140 to be twisted is represented by S3, whereby the cross-sectional area S3 of the second conductor layer 140 is the difference between S2 and S1. After calculating the sectional area S3 of the second conductor layer 140, the sectional area S3 of the second conductor layer 140 is divided by the number of knots of the frame strander 200, that is, the sectional area of the second wire 141 in the second conductor layer 140 is calculated, and the sectional area of the second wire 141 is denoted by S4, so that when using the 127-disc frame strander, the sectional area of the second wire 141 is:

S4＝(S2-S1)/36。

In the second embodiment, when the second conductor layer 140 has two layers, the cross-sectional area of the second conductive line 141 in the second conductor layer 140 is: the cross-sectional area of the second conductor layer 140/(the number of knots at the outermost layer of the frame strander 200 + the number of knots at the penultimate layer of the frame strander 200).

The second conductor layer 140 has two layers, and the second conductor layer 140 may be twisted using the outermost layer of the frame twisting machine 200 and the penultimate layer of the frame twisting machine, for example, in 127 frame twisting machines, the outermost layer of the frame twisting machine has 36 knots and the penultimate layer has 30 knots.

First, the cross-sectional area S3 of the second conductive layer 140 is calculated, and the manner of calculating the cross-sectional area of the second conductive layer 140 is the same as that of the first embodiment, which is not described here again.

After calculating the sectional area S3 of the second conductor layer 140, the sectional area S3 of the second conductor layer 140 is divided by the number of sections of the frame strander 200, so that the sectional area of the second wire 141 in the second conductor layer 140 can be calculated, and since the second conductor layer 140 is two layers, the 30 th section and the 36 th section of the frame strander need to be stranded, the number of the second wires 141 stranded secondarily is the sum of the number of the sections of the outermost layer of the frame strander 200 and the number of the sections of the last second layer of the frame strander 200.

Thus, when using the 127-disc frame cutter, the cross-sectional area of the second wire 141 is:

S4＝(S2-S1)/(36+30)。

the twisting directions between two adjacent second conductor layers 140 are opposite. The second conductor layer 140 closest to the optical fiber conducting layer 130 is twisted in the opposite direction to the optical fiber conducting layer 130.

In the third embodiment, when the second conductor layer 140 is three layers, the cross-sectional area of the second wire 141 in the second conductor layer 140 is: the cross-sectional area of the second conductor layer 140/(the number of knots at the outermost layer of the frame strander 200 + the number of knots at the last but one layer of the frame strander 200).

The second conductor layer 140 is three layers, and the second conductor layer 140 may be twisted using the sum of the nodes of the outermost layer, the second last layer and the third last layer of the frame twisting machine 200, for example, in the 127 frame twisting machine, the number of the nodes of the outermost layer is 36, the number of the nodes of the second last layer is 30, and the number of the nodes of the third last layer is 24.

First, the cross-sectional area S3 of the second conductive layer 140 is calculated, and the manner of calculating the cross-sectional area of the second conductive layer 140 is the same as that of the first embodiment, which is not described here again.

After calculating the sectional area S3 of the second conductor layer 140, the sectional area S3 of the second conductor layer 140 is divided by the number of knots of the frame strander 200, so that the sectional area of the second wire 141 in the second conductor layer 140 can be calculated, and since the second conductor layer 140 is three layers, the 24 th knot, the 30 th knot and the 36 th knot of the frame strander are required to be used for stranding, and therefore, the number of the second wires 141 stranded secondarily is the sum of the number of knots of the outermost layer of the frame strander 200, the number of knots of the last layer of the frame strander 200, and the number of knots of the last third layer of the frame strander 200.

Thus, when using the 127-disc frame cutter, the cross-sectional area of the second wire 141 is:

S4＝(S2-S1)/(36+30+24)。

Among the three second conductor layers 140, the adjacent two second conductor layers 140 are twisted in opposite directions. The second conductor layer 140 closest to the optical fiber conducting layer 130 is twisted in the opposite direction to the optical fiber conducting layer 130.

Therefore, the number of the joints of the frame strander 200 can be selected to be stranded according to the specific number of the layers of the second conductor layer 140, so that the use process of the frame strander 200 is more flexible.

It should be noted that, the frame strander 200 further includes a glue injection device, where the glue injection device is used to inject water-blocking glue between the center line 110 and the first wires 121, between the first wires 121, and between the first wires 121 and the optical fiber conductive layer 130 during one stranding process, so as to improve the water-blocking property of the submarine cable semi-finished product 100 a.

Fig. 5 is a second flowchart of a submarine cable manufacturing method according to an embodiment of the present application.

Referring to fig. 5, after twisting once using the frame twister 200 to twist the center line 110 of the submarine cable 100, the first conductor layer 120 and the optical fiber conductive layer 130, it includes:

s103, wrapping two layers of first water-blocking binding bands 150 outside the optical fiber conducting layer 130.

Specifically, after one twisting, the first binding band wrapping device 700 (shown in fig. 3) may further cover the optical fiber conductive layer 130 with two layers of the first water blocking bands 150, so as to further improve the water blocking property of the submarine cable semi-finished product 100 a. In addition, the first water-blocking tape 150 on the outer layer may also provide protection to the first water-blocking tape 150 on the inner layer.

S104, heating the center line 110, the first conductor layer 120, and the optical fiber conductive layer 130.

Specifically, the central line 110, the first conductor layer 120 and the optical fiber conductive layer 130 coated with the first water blocking bandage 150 are placed into a baking device for heating, so that the solidification of water blocking glue in the submarine cable semi-finished product 100a can be accelerated, and abnormal conditions such as bulge and the like in the secondary twisting process can be prevented. It should be noted that, the outer side of the optical fiber 131 may be wrapped with a layer of heat insulation material, so as to avoid the influence on the optical fiber 131 during heating.

Fig. 6 is a flowchart III of a submarine cable manufacturing method according to an embodiment of the present application.

Referring to fig. 6, the secondary twisting using the frame twisting machine 200 to twist the second conductor layer 140 of the submarine cable 100 includes: s105, peeling off the first water-blocking bandage 150 of the outer layer.

The first water blocking strap 150 located on the outer layer may be stripped by the stripping machine 800 prior to secondary twisting, avoiding the water blocking layer being set too thick such that the effective conductive area in the submarine cable 100 is reduced.

In addition, after secondary stranding, two layers of second water-blocking tape 160 may also be wrapped around second conductor layer 140 by a second tape wrapping apparatus 900 (shown in FIG. 4).

Fig. 7 is a schematic structural diagram of a submarine cable according to an embodiment of the present application.

Referring to fig. 7, an embodiment of the present application further provides a submarine cable 100, including a center line 110, a first conductor layer 120, an optical fiber conductive layer 130, a first water blocking tape 150, a second conductor layer 140, a second water blocking tape 160 and a protective layer 170 sequentially disposed from inside to outside in a radial direction R of the submarine cable 100, where the first conductor layer 120 is a plurality of layers, each layer of the first conductor layer 120 includes a plurality of first conductive wires 121 sequentially disposed along a circumferential direction C of the submarine cable, the second conductor layer 140 is at least one layer, and each layer of the second conductor layer 140 includes a plurality of second conductive wires 141 sequentially disposed along the circumferential direction C of the submarine cable 100.

Submarine cable 100 has a circular cross section, and submarine cable 100 includes a radial direction R and a circumferential direction C. The center line 110 is the axis of the submarine cable 100, and the cross section of the center line 110 is circular.

The first conductor layer 120 surrounds the outside of the center line 110, and a plurality of first conductor layers 120 may be provided, and in the embodiment shown in fig. 7, four first conductor layers 120 are provided. Each first conductor layer 120 includes a plurality of first wires 121, and the first wires 121 in each first conductor layer 120 are sequentially arranged in the circumferential direction. The center line 110 and the first conductive line 121 may be copper wires or aluminum wires, and the center line 110 and the first conductive line 121 serve to transmit electrical signals.

The optical fiber conductive layer 130 is located outside the first conductor layer 120, and the optical fiber conductive layer 130 includes a plurality of optical fibers 131, where the plurality of optical fibers 131 are uniformly spaced apart along the circumferential direction C, and the optical fibers 131 are used for transmitting optical signals.

The second conductor layer 140 is located outside the optical fiber conductive layer 130, and one second conductor layer 140 may be provided, or two or more second conductor layers 140 may be provided. In the embodiment shown in fig. 7, a second conductor layer 140 is provided. The second conductor layer 140 includes a plurality of second wires 141, and the plurality of second wires 141 are sequentially arranged in the circumferential direction. The second wire 141 may be a copper wire or an aluminum wire, and the second wire 141 is used to transmit an electrical signal. Compared to the prior art in which only the first conductor layer is provided, the embodiment of the present application can increase the cross-sectional area of the conductive wire for transmitting the electrical signal in the submarine cable 100 by providing the first conductor layer 120 and the second conductor layer 140, thereby improving the current-carrying capacity of the submarine cable 100.

With continued reference to fig. 7, a first water-blocking strap 150 is disposed between the second conductor layer 140 and the optical fiber conductive layer 130, and a second water-blocking strap 160 is disposed outside the second conductor layer 140, that is, there are two waterproof measures in the submarine cable 100, when the water-blocking performance of the second water-blocking strap 160 is reduced, only the transmission performance of the second conductor layer 140 is affected, and the first conductor layer 120 and the optical fiber conductive layer 130 can still work normally, so that the reliability of the submarine cable 100 can be improved.

With continued reference to fig. 7, the outermost side of the submarine cable 100 is provided with a protective layer 170, which protective layer 170 may be multi-layered, for example, the protective layer 170 is schematically shown in fig. 7 to include a PE filling layer 171, a PP inner bedding layer 172 and an armoured steel wire layer 173. Wherein the PE filling layer refers to a filling layer made of Polyethylene (PE), and the PP inner cushion layer refers to an inner cushion layer made of Polypropylene (PP). The protective layer 170 is used to protect the various layers in the submarine cable 100.

The optical fiber 131 in the submarine cable 100 is fragile, and the protection layer 170 protects the optical fiber 131, so that the optical fiber 131 can be better protected in the transportation and laying processes of the submarine cable 100, however, the optical fiber 131 is still damaged when the submarine cable 100 encounters an anchor damage. In the embodiment of the present application, the second conductor layer 140 is disposed on the outer side of the optical fiber conductive layer 130, so that the second conductor layer 140 can protect the optical fiber conductive layer 130 while transmitting the electrical signal, thereby further improving the reliability of the submarine cable 100. Wherein, anchor harm refers to: due to towing or bumping of the streamers of the vessel or other structure, excessive bending of the sea cable may occur, causing breakage or other damage to the sea cable

According to the submarine cable 100 provided by the embodiment of the application, by arranging the central line 110, the first conductor layer 120, the optical fiber conducting layer 130, the first water-blocking binding band 150, the second conductor layer 140, the second water-blocking binding band 160 and the protective layer 170, wherein the first conductor layer 120 is a plurality of layers, each layer of first conductor layer 120 comprises a plurality of first wires 121 which are sequentially arranged along the circumferential direction C of the submarine cable, the second conductor layer 140 is at least one layer, and each layer of second conductor layer 140 comprises a plurality of second wires 141 which are sequentially arranged along the circumferential direction C of the submarine cable 100. Compared to the prior art in which only the first conductor layer is provided, the embodiment of the present application can increase the cross-sectional area of the conductive wire for transmitting the electrical signal in the submarine cable 100 by providing the first conductor layer 120 and the second conductor layer 140, thereby improving the current-carrying capacity of the submarine cable 100. Having two layers of waterproofing measures of first water blocking strap 150 and second water blocking strap 160 in submarine cable 100 may improve the reliability of use of submarine cable 100. The second conductor layer 140 is disposed on the outer side of the optical fiber conductive layer 130, and the second conductor layer 140 can protect the optical fiber conductive layer 130 while transmitting electrical signals, thereby further improving the reliability of the submarine cable 100.

Fig. 8 is a schematic structural diagram of a first wire in a submarine cable according to an embodiment of the present application.

Referring to fig. 8, the first conductive wire 121 has a trapezoid shape, the first short side 1211 of the first conductive wire 121 faces the center line 110, the first long side 1212 of the first conductive wire 121 faces away from the center line 110, and the first oblique sides 1213 of adjacent first conductive wires 121 abut; the spacing between the first long side 1212 and the first short side 1211 is less than the spacing between the two first beveled edges 1213.

Each layer of the submarine cable 100 gradually increases in diameter from inside to outside, the first conductive wire 121 is arranged in a trapezoid shape, the first short side 1211 of the first conductive wire 121 faces the center line, the first long side 1212 faces away from the center line 110, so that the structure of the first conductive wire 121 can be better adapted to the gradually increasing diameter of the submarine cable 100 from inside to outside, in addition, the first inclined sides 1213 of the adjacent first conductive wires 121 are abutted, and compared with the case that the first conductive wires 121 are circular in the related art, the area of the hollow area in the submarine cable 100 can be reduced, and therefore the area of the first conductive layer 120 in the submarine cable 100 can be increased.

With continued reference to fig. 8, the first long side 1212 has a dimension L1, the first short side 1211 has a length L2, the distance between the first long side 1212 and the first short side 1211 is h1, the distance between the midpoints of the two first oblique sides 1213 is h2, h1 is smaller than h2, that is, the first conductive wire 121 has a flat trapezoid, and the first conductive wire 121 has a flat trapezoid, so that the problem of loose strands or poor water resistance caused by the overturn of the first conductive wire 121 can be avoided. In some embodiments, the first wire 121 may be controlled to have a flat trapezoid shape by the formula L1-L2. Gtoreq.h1/2.

Fig. 9 is a schematic structural diagram of a second wire in a submarine cable according to an embodiment of the present application.

Referring to fig. 7 and 9, the second conductive line 141 has a trapezoid shape, the second short side 1411 of the second conductive line 141 faces the center line 110, the second long side 1412 of the second conductive line 141 faces away from the center line 110, and the second oblique sides 1413 of adjacent second conductive lines 141 abut; the spacing between the second long side 1412 and the second short side 1411 is smaller than the spacing between the two second oblique sides 1413.

The second conductive wire 141 may also be configured as a trapezoid, and the second short side 1411 of the second conductive wire 141 faces the center line, and the second long side 1412 faces away from the center line 110, so that the structure of the second conductive wire 141 may be better adapted to the gradually increasing diameter of the submarine cable 100 from inside to outside, and in addition, the second oblique sides 1413 of the adjacent second conductive wires 141 abut against each other, so that the area of the hollow area in the submarine cable 100 may be reduced, and thus the area of the second conductor layer 140 in the submarine cable 100 may be increased.

With continued reference to fig. 9, the second long side 1412 has a dimension L3, the second short side 1411 has a length L4, the distance between the second long side 1412 and the second short side 1411 is h3, the distance between the midpoints of the two second oblique sides 1413 is h4, h3 is smaller than h4, that is, the second conductive wire 141 has a flat trapezoid, and the second conductive wire 141 has a flat trapezoid, so that the problem of loose strands or poor water resistance caused by the overturn of the second conductive wire 141 can be avoided. In some embodiments, the second wire 141 may be controlled to have a flat trapezoid shape by the formula L3-L4 ≡h3/2.

Note that, as shown in fig. 8 and 9, four corners of the first conductive line 121 and the second conductive line 141 have chamfers, and the size of the chamfers may be 80 ° to 100 °.

Fig. 10 is a schematic diagram of a submarine cable according to an embodiment of the present application; fig. 11 is a schematic diagram of a second structure of a first wire in a submarine cable according to an embodiment of the present application.

Referring to fig. 10 and 11, the first conductive wire 121 is in the shape of a fan, the first conductive wire 121 includes a first inner arc 1214 and a first outer arc 1215, the first inner arc 1214 is directed toward the centerline, and the first outer arc 1215 is directed away from the centerline; the two first sides 1216 of the first wires 121 have first teeth 1216a, and the first teeth 1216a on the first sides 1216 of adjacent two first wires 121 are engaged.

The fanning shape is better adapted to the increasing diameter of the submarine cable 100 from inside to outside relative to the trapezoidal shape, thereby reducing the area of the hollow area in the submarine cable 100, and thus increasing the area of the first conductive layer 120 in the submarine cable 100.

The first side 1216 has first teeth 1216a, and in the embodiment shown in fig. 10 and 11, one first tooth 1216a is shown, with the first teeth 1216a on the first side 1216 of two adjacent first wires 121 engaging to prevent the first wires 121 from flipping over.

Fig. 12 is a schematic diagram of a second conductive wire in a submarine cable according to an embodiment of the present application.

Referring to fig. 10 and 12, the second wire 141 is in the shape of a fan ring, the second wire 141 includes a second inner arc 1414 and a second outer arc 1415, the second inner arc 1414 faces the center line, and the second outer arc 1415 faces away from the center line; the second sides 1416 of the second wires 141 have second teeth 1416a, and the second teeth 1416a on the second sides 1416 of adjacent two second wires 141 are engaged.

The fanning shape is better adapted to the increasing diameter of the submarine cable 100 from inside to outside relative to the trapezoidal shape, thereby reducing the area of the hollow area in the submarine cable 100, and thus increasing the area of the first conductive layer 120 in the submarine cable 100.

The second side 1416 has second teeth 1416a, and in the embodiment shown in fig. 10 and 12, one second tooth 1416a is shown, with the second teeth 1416a on the second side 1416 of two adjacent second wires 141 engaging to prevent the second wires 141 from tipping over.

Fig. 13 is a schematic diagram of a submarine cable according to an embodiment of the present application.

Referring to fig. 13, the first wire 121 has a fan shape having a first tooth 1216a, and the second wire 141 has a trapezoid shape.

Fig. 14 is a schematic structural diagram of a submarine cable according to an embodiment of the present application.

Referring to fig. 14, the second wire 141 has a fan shape having a second tooth 1416a, and the first wire 121 has a trapezoid shape. That is, the shapes of the first and second wires 121 and 141 may be the same or different. This is because the first conductor layer 120 and the second conductor layer 140 are made by twisting twice, and the shapes of the two twisted wires may be different, whereby the wires of different shapes may be selected according to actual needs.

Next, a specific structure of the optical fiber conductive layer 130 will be described.

FIG. 15 is a schematic structural diagram of an optical fiber filling layer in a submarine cable according to an embodiment of the present application; fig. 16 is a schematic structural view of a first filling section in a submarine cable according to an embodiment of the present application; fig. 17 is a schematic structural diagram of a second filling section in a submarine cable according to an embodiment of the present application. Wherein the optical fiber 131 is also shown in fig. 16, so as to clearly show the mating of the optical fiber 131 with the first filling segment 1321.

With continued reference to fig. 15-17, the optical fiber conductive layer 130 further includes a plurality of filling segments 132, the plurality of optical fibers 131 and the plurality of filling segments 132 being spaced apart along the circumferential direction C of the submarine cable 100; the filling section 132 comprises a first filling section 1321 and a second filling section 1322, wherein the first filling section 1321 is arranged on two sides of the optical fiber 131, and one side of the first filling section 1321 facing the optical fiber 131 is attached to the outer wall of the optical fiber 131; the plurality of second filling segments 1322 are sequentially arranged along the circumferential direction C on one side of the first filling segment 1321 facing away from the optical fiber 131, the one side of the first filling segment 1321 facing away from the optical fiber 131 is provided with a third tooth 1321a, and both sides of the second filling segment 1322 are provided with a fourth tooth 1322a; the third tooth 1321a is engaged with a fourth tooth 1322a adjacent to the third tooth 1321a, and the adjacent fourth tooth 1322a is engaged.

The first filling segment 1321 and the second filling segment 1322 are preformed filling segments, and the first filling segment 1321, the second filling segment 1322, and the optical fiber 131 are twisted to form the optical fiber conductive layer 130.

The filling segments 132 on two sides of the optical fiber 131 are first filling segments 1321, and one side of the first filling segments 1321 facing the optical fiber 131 is attached to the outer wall of the optical fiber 131, so that the optical fiber 131 is better protected.

The third tooth 1321a is engaged with the fourth tooth 1322a adjacent to the third tooth 1321a, so that there is a better coupling force between the first filling segment 1321 and the second filling segment 1322. The fourth adjacent teeth 1322a provide a better bonding force between the second adjacent filling segments 1322.

In some embodiments, first water-blocking strap 150 is a butt-wrap; second water-blocking strap 160 is a lap wrap.

The second conductor layer 140 is further arranged on the outer side of the first water-blocking bandage 150, and the first water-blocking bandage 150 is wrapped by adopting butt seams, so that the first water-blocking bandage 150 is prevented from being provided with protrusions, and the second wires 141 in the second conductor layer 140 are enabled to generate protrusions along the circumferential direction C.

Second water-blocking strap 160 is no longer provided with a conductive layer on the outside, and therefore second water-blocking strap 160 is a lap wrap, so that submarine cable 100 may have a better water-blocking property. The covering rate of the covering and wrapping can be 25% -30%.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present application, and not for limiting the same; although the application has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the application.

Claims (13)

1. A submarine cable manufacturing method, comprising:

Twisting once by using a frame twisting machine so as to twist the central line of the submarine cable, the first conductor layer and the optical fiber conducting layer;

And performing secondary twisting by using the frame twisting machine so as to twist the second conductor layer of the submarine cable, wherein the frame twisting machine with the same specification is used for the primary twisting and the secondary twisting.

2. The submarine cable manufacturing method according to claim 1, wherein said twisting the second conductor layer of the submarine cable with the frame twister comprises: when the second conductor layer is one layer, the sectional area of the second wire in the second conductor layer is as follows: the cross-sectional area of the second conductor layer/the number of knots of the outermost layer of the frame strander.

3. The submarine cable manufacturing method according to claim 1, wherein said twisting the second conductor layer of the submarine cable with the frame twister comprises: when the second conductor layer is two layers, the sectional area of the second wire in the second conductor layer is as follows: the section area of the second conductor layer/(the number of nodes of the outermost layer of the frame strander+the number of nodes of the penultimate layer of the frame strander).

4. The submarine cable manufacturing method according to claim 1, wherein said twisting the second conductor layer of the submarine cable with the frame twister comprises: when the second conductor layer is three layers, the sectional area of the second wire in the second conductor layer is as follows: the section area of the second conductor layer/(the number of the nodes of the outermost layer of the frame strander+the number of the nodes of the last but one layer of the frame strander).

5. The submarine cable manufacturing method according to any one of claims 1 to 4, wherein after stranding once using a frame stranding machine to twist a center line of the submarine cable, the first conductor layer, and the optical fiber conductive layer comprises:

Coating two layers of first water-blocking binding bands outside the optical fiber conducting layer;

heating the centerline, the first conductor layer, and the optical fiber conductive layer.

6. The submarine cable manufacturing process according to claim 5, wherein said secondary stranding using said frame stranding machine to twist the second conductor layer of the submarine cable is preceded by:

And stripping the first water-blocking bandage of the outer layer.

7. The utility model provides a sea cable, its characterized in that, includes along the radial inside to outside of sea cable sets gradually central line, first conductor layer, optic fibre conducting layer, first bandage that blocks water, second conductor layer, second bandage and inoxidizing coating block water, wherein, first conductor layer is the multilayer, every layer first conductor layer includes along a plurality of first wires that the circumference of sea cable was arranged in proper order, the second conductor layer is at least one deck, every layer the second conductor layer includes a plurality of edges a plurality of second wires that the circumference of sea cable was arranged in proper order.

8. The submarine cable according to claim 7, wherein said first conductors are trapezoidal in shape with a first short side of said first conductors facing toward said centerline, a first long side of said first conductors facing away from said centerline, a first hypotenuse of an adjacent said first conductor abutting;

the distance between the first long side and the first short side is smaller than the distance between the two first bevel sides.

9. The submarine cable according to claim 7, wherein said second conductor is trapezoidal with a second short side of said second conductor facing toward said centerline, a second long side of said second conductor facing away from said centerline, a second hypotenuse of an adjacent said second conductor abutting;

the distance between the second long side and the second short side is smaller than the distance between the two second bevel sides.

10. The submarine cable according to claim 7, wherein said first conductor is fan-shaped, said first conductor comprising a first inner arc and a first outer arc, said first inner arc facing toward said centerline, said first outer arc facing away from said centerline;

The two first sides of the first lead are provided with first teeth parts, and the first teeth parts on the first sides of the two adjacent first leads are meshed.

11. The submarine cable according to claim 7, wherein said second conductor is fan-shaped, said second conductor comprising a second inner arc and a second outer arc, said second inner arc facing toward said centerline, said second outer arc facing away from said centerline;

the second side of the second wire is provided with a second tooth part, and the second tooth parts on the second side of two adjacent second wires are meshed.

12. The submarine cable according to any one of claims 7 to 11, wherein said optical fiber conducting layer comprises a plurality of filler segments and a plurality of optical fibers, the plurality of optical fibers and the plurality of filler segments being spaced apart along the circumference of the submarine cable;

The filling section comprises a first filling section and a second filling section, the first filling section is arranged on two sides of the optical fiber, and one side of the first filling section, which faces the optical fiber, is attached to the outer wall of the optical fiber;

The plurality of second filling sections are sequentially arranged along the circumferential direction on one side, away from the optical fiber, of the first filling section, a third tooth part is arranged on one side, away from the optical fiber, of the first filling section, and fourth tooth parts are arranged on two sides of the second filling section; the third tooth portion is engaged with the fourth tooth portion adjacent to the third tooth portion, and the adjacent fourth tooth portion is engaged.

13. The submarine cable according to any one of claims 7 to 11, wherein said first water-blocking strap is a butt-strap; the second water-blocking binding band is a lap wrapping.