CN217879762U - Steel-plastic composite belt for submarine cable - Google Patents
Steel-plastic composite belt for submarine cable Download PDFInfo
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- CN217879762U CN217879762U CN202222361952.9U CN202222361952U CN217879762U CN 217879762 U CN217879762 U CN 217879762U CN 202222361952 U CN202222361952 U CN 202222361952U CN 217879762 U CN217879762 U CN 217879762U
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Abstract
The utility model discloses a steel-plastic composite belt for submarine cable belongs to submarine cable technical field. The steel-plastic composite belt is used for surrounding and protecting the outer circumference of the optical fiber unit and is formed by splicing a plurality of fan-shaped special-shaped composite belts with concave curved surfaces and convex curved surfaces; and a strip-shaped groove and/or a crossed groove crossed with the axial direction of the optical fiber unit are/is formed in the whole length direction or part length direction of the special-shaped composite belt concave curved surface. Through the utility model discloses, a steel is moulded composite band for submarine cable provides a bar groove and/or crossing groove have been seted up on the concave curved surface of forming steel and moulding composite band holistic every dysmorphism composite band, can strengthen the resistance to pressure layer and hinder the grabs resultant force that glues of water to the filler for it is difficult to be washed away by the sea water drive that flows to block water to glue, and then reduces the impaired and crooked condition of intaking of submarine optical cable.
Description
Technical Field
The utility model relates to a steel is moulded and is taken for submarine cable belongs to submarine cable technical field.
Background
Submarine cables (submarine cables) are cables wrapped with insulating materials and laid on the sea floor for telecommunication transmission. The submarine cable is divided into a submarine communication cable and a submarine power cable. Modern submarine cables use optical fiber as the material to transmit telephone and internet signals.
In the fabrication of undersea optical cables, the optical fibers are first embedded in a jelly-like compound, protecting the cable from damage even in the event of contact with seawater. Then the optical cable is put into a circular tube made of the steel-plastic composite tape to prevent the optical cable from being damaged by water pressure. Then the steel wire is wrapped in the steel wire with extremely high integral strength, and is sleeved in the copper pipe, and finally, a protective layer made of polyethylene material is sleeved on the copper pipe. Near the coast of the continental shelf, submarine cables are usually laid using lighter weight cables with stronger steel wires and covered with an asphalt coating to prevent seawater corrosion.
The steel-plastic composite belt consists of a steel belt and a plastic film coated on the steel belt, wherein the main raw material in the plastic film is ethylene-ethyl acrylate copolymer.
The submarine optical cable will be described with reference to the accompanying drawings.
Fig. 1 is a schematic sectional view showing a main part of an undersea cable (or an undersea optical cable) using an optical fiber as an information transmission medium, in which 1 shows an optical fiber unit, 2 is a pressure-resistant layer for protecting the optical fiber unit 1 from the pressure of seawater in the deep sea, the pressure-resistant layer is made of a steel-plastic composite tape, 3 is a reinforcing steel wire, and 4 is a copper pipe for fixing the reinforcing steel wire. In addition, although not shown in fig. 1, the outer periphery of the copper pipe 4 is covered with an insulating layer made of low density polyethylene or the like, and the surface thereof is covered with an outer sheath made of high density polyethylene or the like, thereby constituting a submarine cable.
In the optical fiber submarine cable as described above, the pressure-resistant layer 2 (steel-plastic composite tape) generally shows the sectional shapes of the shaped composite tapes 21 to 23 in fig. 2 (enlarged explanatory view) by combining three shaped composite tapes 21 having a substantially fan-shaped sectional shape, the shaped composite tapes 21 to 23 having a pair of inclined surfaces 30a, 30b, a concave curved surface 31, a convex curved surface 32 constituting the outer peripheral surface of the pressure-resistant layer 2, and the like.
Between the optical fiber unit 1 and the pressure-resistant layer 2 (steel-plastic composite tape), a compound similar to jelly, i.e. a water-blocking glue, is filled for preventing water from entering the submarine cable due to damage.
In the optical fiber submarine cable having the above-described structure, a water blocking glue is filled in order to prevent water from entering. However, when the submarine cable is damaged due to the influence of the external environment and is subjected to bending stress, for example, the pressure of seawater, the special-shaped composite tapes are easily displaced, gaps are also easily formed between the optical fiber unit 1 and the pressure-resistant layer 2 and between the special-shaped composite tapes, and even if water-blocking glue exists, the water-blocking glue at the damaged position is easily driven by flowing seawater to be washed away, so that the problem of water inflow of the submarine cable during bending damage cannot be effectively solved.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem, an object of the utility model is to provide a steel is moulded and is taken for submarine cable, can avoid submarine cable under impaired and crooked condition, the phenomenon of seeping water appears.
The utility model discloses the technical problem that will solve takes following technical scheme to realize:
a steel-plastic composite belt for submarine cables is used for surrounding and protecting the outer circumference of an optical fiber unit, and is formed by splicing a plurality of fan-shaped special-shaped composite belts with concave curved surfaces and convex curved surfaces;
and a strip-shaped groove and/or a crossed groove crossed with the axial direction of the optical fiber unit are/is formed in the whole length direction or part length direction of the special-shaped composite belt concave curved surface.
As a preferable example, inclined surfaces are respectively formed between both sides of the concave curved surface and the convex curved surface of the special-shaped composite tape, and a strip-shaped groove and/or a cross groove crossing the axial direction of the optical fiber unit are formed in the whole length or a part of the length direction of the inclined surface of the special-shaped composite tape.
As a preferable example, the groove depth of the strip-shaped groove and/or the intersecting groove is 0.005 to 0.4mm.
As a preferable example, at least 50 strip grooves or cross grooves are formed per 1m length on each of the profile composite tapes.
As a preferable example, the interval between two adjacent strip-shaped grooves or crossed grooves on the special-shaped composite belt is less than or equal to 20mm.
As a preferred example, when the strip-shaped grooves and/or the intersecting grooves are formed in the lengthwise direction of the profiled composite tape, the groove-formed regions and the groove-unformed regions are formed alternately.
As a preferred example, the tensile strength of the profiled composite strip is 1200N/mm 2 And an elongation at break of 2.0% or more.
The utility model has the advantages that:
(1) Through the utility model, the steel-plastic composite belt for the submarine cable is provided, the strip-shaped groove and/or the crossed groove are/is arranged on the concave curved surface of each special-shaped composite belt forming the whole steel-plastic composite belt, the grabbing force of the pressure-resistant layer on the water-blocking glue of the filler can be enhanced, the water-blocking glue is not easy to be flushed away by the flowing seawater, and the water inlet condition when the submarine optical cable is damaged and bent is further reduced;
(2) Through the utility model discloses, on the whole length or the partial length direction on special-shaped composite band inclined plane, set up with the criss-cross bar groove of optical fiber unit axial direction and/or cross groove, can increase the driving fit between the special-shaped composite band, reduce simultaneously between the special-shaped composite band owing to receive the phenomenon that external force influence produced the dislocation, appeared the gap.
Drawings
Fig. 1 is a schematic view of a partial cross-sectional structure of an embodiment of the submarine cable according to the present invention;
FIG. 2 is a schematic cross-sectional view of a special-shaped composite strip constituting a steel-plastic composite strip according to an embodiment of the present invention;
fig. 3 is a schematic structural view of a special-shaped composite belt in embodiment 1 of the present invention;
fig. 4 is a schematic structural view of a special-shaped composite belt in embodiment 2 of the present invention;
fig. 5 is a schematic structural view of the special-shaped composite belt in embodiment 3 of the present invention.
In the figure:
1. an optical fiber unit;
2. a pressure-resistant layer; 21. a profiled composite tape; 201. a bevel; 202. a concave curved surface; 203. a convex curved surface; 204. a strip-shaped groove; 205. a cross slot; 206. a groove forming region; 207. a groove non-formation region;
3. a filler;
4. reinforcing the steel wire;
5. copper tubing.
Detailed Description
In order to make the technical means, the creation features, the achievement purposes and the functions of the present invention easy to understand, the present invention will be further described with reference to the following specific drawings and embodiments.
The invention provides a novel steel-plastic composite belt, which is applied to a submarine cable, as shown in figure 1, the submarine cable comprises an optical fiber unit 1, a filler 3, a pressure-resistant layer 2, a reinforcing steel wire 4, a copper pipe 5 and an insulating layer (not shown) from inside to outside in sequence, and is a schematic view of a partial cross-section structure of the submarine cable in the embodiment of the invention.
Wherein:
the optical fiber unit 1: the optical fiber bundle composed of a plurality of optical fiber filaments transmits telephone and internet signals.
Filler 3: namely, the water-blocking glue is in a jelly shape, such as silica gel, and is filled between the pressure-resistant layer 2 and the optical fiber unit 1 to prevent the submarine cable from being damaged to cause water inflow.
Pressure-resistant layer 2: namely, the steel-plastic composite tape is formed by splicing the special-shaped composite tapes 21, so that the optical fiber unit 1 in the submarine cable can be prevented from being influenced by the pressure of seawater in deep sea.
Reinforcing the steel wire 4: the integral stretching-resistant shape and strength of the submarine cable are improved.
Copper pipe 5: cup joint in reinforcing steel wire 4 outsidely, be used for tightening up spacing reinforcing steel wire 4 on the one hand, on the other hand improves submarine cable's abrasion resistance.
Insulating layer: not shown in fig. 1, the insulating layer is made of low density polyethylene and high density polyethylene, and covers the outer periphery of the copper pipe 5 to perform an insulating function.
Example 1:
as shown in fig. 2-3, the embodiment 1 of the present invention is an improvement on the existing submarine cable steel-plastic composite belt.
The steel-plastic composite belt is used for encirclingProtecting the outer circumference of the optical fiber unit 1, wherein the steel-plastic composite belt is formed by splicing three fan-shaped special-shaped composite belts 21 with concave curved surfaces 202 and convex curved surfaces 203; the angle of each fan-shaped special-shaped composite belt 21 is 120 degrees, an inclined plane 201 is respectively formed between the two sides of the concave curved surface 202 and the convex curved surface 203 of the special-shaped composite belt 21, the diameter from the center of the fan-shaped special-shaped composite belt 21 to the convex curved surface 203 is 3.0mm, the distance from the concave curved surface 202 to the convex curved surface 203 is 1.5mm, wherein the tensile strength of the special-shaped composite belt 21 in the embodiment is 1200N/mm 2 And an elongation at break of 2.0% or more.
In order to enhance the grabbing force of the pressure-resistant layer 2 on the water-blocking glue of the filler 3, the water-blocking glue is not easy to be flushed away by the flowing seawater, and the condition that water enters the submarine optical cable when the submarine optical cable is damaged and bent is further reduced. A strip-shaped groove 204 intersecting the axial direction of the optical fiber unit 1 is formed over the entire length of the concave curved surface 202 of the special-shaped composite tape 21. The strip-shaped grooves 204 can increase the grabbing force of the steel-plastic composite belt on the water-blocking glue, so that the water-blocking glue is not easy to be washed away by flowing seawater.
Moreover, the strip-shaped groove 204 intersecting the axial direction of the optical fiber unit 1 is also formed over the entire length of the inclined surface 201 of the special-shaped composite tape 21, so that the adhesion between the special-shaped composite tapes 21 can be increased, and the phenomena of dislocation and gap occurrence between the special-shaped composite tapes 21 due to the influence of external force can be reduced.
Preferably, the groove depth of the strip-shaped groove 204 is 0.005 to 0.4mm, and if the groove depth is less than 0.005mm, it is difficult to secure gripping force to the water-blocking adhesive, and the flow of the water-blocking adhesive cannot be effectively restricted. If the groove depth is greater than 0.4mm, the strength of the shaped composite tape 21 itself is lowered by the excessively deep groove.
Preferably, at least 50 strip-shaped grooves 204 are formed in each 1m of the special-shaped composite tape 21, and similarly, the number of the grooves is more than 50, so that the gripping performance of the water-blocking adhesive can be ensured, the water-blocking adhesive can be effectively prevented from being washed away by seawater, and the optical fiber unit 1 can be prevented from entering water.
Preferably, the interval between two adjacent strip-shaped grooves 204 on the special-shaped composite belt 21 is less than or equal to 20mm.
Example 2:
as shown in fig. 4, the embodiment 2 of the present invention provides another special-shaped composite tape 21 structure different from that of embodiment 1, the difference is only in the groove type on the special-shaped composite tape 21, that is, the strip-shaped groove 204 and the cross-shaped groove 205 intersecting with the axial direction of the optical fiber unit 1 are provided over the entire length of the concave curved surface 202 of the special-shaped composite tape 21, the number of the grooves provided per meter of the special-shaped composite tape 21 is more than 50, and the strip-shaped groove 204 and the cross-shaped groove 205 intersecting with the axial direction of the optical fiber unit 1 are also provided over the entire length of the inclined surface 201 of the special-shaped composite tape 21, and the grooves of two different types are adopted in embodiment 2, so that the grooves of the concave surface and the inclined surface 201 of the special-shaped composite tape 21 can be more complicated, and the stronger gripping force for the water-blocking glue can be improved, but the strength of the special-shaped composite tape 21 can be correspondingly reduced due to the increase of the density of the grooves.
Example 3:
as shown in fig. 5, the embodiment 3 of the present invention provides another special-shaped composite tape 21 structure different from that of the embodiment 1, which is different only in that a strip groove 204 is formed in the region, and in the embodiment 1, a strip groove 204 crossing the axial direction of the optical fiber unit 1 is formed in the entire length of the concave curved surface 202 and the inclined surface 201 of the special-shaped composite tape 21.
In this embodiment, the strip-shaped groove 204 is formed only in the longitudinal direction of the concave curved surface 202 of the composite tape 21, and the groove forming region 206 and the groove non-forming region 207 are alternately formed on the concave curved surface 202 when the strip-shaped groove 204 is formed, so that the design has a greater tensile strength and elongation at break than those of embodiment 1, but the gripping force of the water-blocking adhesive is smaller than that of embodiment 1.
To sum up, the utility model discloses following beneficial effect has:
through the utility model, a steel-plastic composite belt for submarine cables is provided, a strip-shaped groove 204 and/or a cross groove 205 are/is arranged on a concave curved surface 202 of each special-shaped composite belt 21 forming the whole steel-plastic composite belt, so that the grabbing force of a pressure-resistant layer 2 on a filler 3 water-blocking glue can be enhanced, the water-blocking glue is not easy to be washed away by flowing seawater, and the condition of water inflow when a submarine optical cable is damaged and bent is further reduced;
through the utility model discloses, on the whole length or the partial length direction on special-shaped composite area 21 inclined plane 201, set up with 1 axial direction crossing bar groove 204 of optical fiber unit and/or cross groove 205, can increase the driving fit between the special-shaped composite area 21, reduce simultaneously between the special-shaped composite area 21 owing to receive the phenomenon that the external force influence produced the dislocation, appeared the gap.
The foregoing text describes and illustrates the principles, principal features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that various changes and modifications may be made without departing from the spirit and scope of the invention, and all such changes and modifications are intended to fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (7)
1. A steel-plastic composite tape for submarine cables for surrounding and protecting the outer circumference of optical fiber units, characterized in that:
the steel-plastic composite belt is formed by splicing a plurality of fan-shaped special-shaped composite belts with concave curved surfaces and convex curved surfaces;
and a strip-shaped groove and/or a crossed groove crossed with the axial direction of the optical fiber unit are/is formed in the whole length direction or part length direction of the special-shaped composite belt concave curved surface.
2. The steel-plastic composite strip for the submarine cable according to claim 1, wherein an inclined surface is formed between both sides of the concave curved surface and the convex curved surface of the shaped composite strip, and a strip-shaped groove and/or a cross-shaped groove crossing the axial direction of the optical fiber unit is formed in the entire length or a part of the length direction of the inclined surface of the shaped composite strip.
3. The steel-plastic composite strip for submarine cables according to claim 1, wherein the groove depth of said strip-shaped grooves and/or of said crossed grooves is 0.005-0.4mm.
4. The steel-plastic composite strip for submarine cables according to any one of claims 1-3, wherein at least 50 strip-shaped or cross-shaped grooves are formed per 1m length of each of said profiled composite strips.
5. The steel-plastic composite strip for the submarine cable according to claim 1, wherein the interval between two adjacent strip-shaped grooves or crossed grooves on the specially-shaped composite strip is less than or equal to 20mm.
6. The steel-plastic composite tape for submarine cables according to claim 1 or 2, wherein when the strip-shaped grooves and/or the intersecting grooves are formed in the lengthwise direction of the profiled composite tape, the groove-formed regions and the groove-unformed regions are formed alternately.
7. The steel-plastic composite strip for submarine cables according to claim 1, wherein said profiled composite strip has a tensile strength of 1200N/mm 2 And an elongation at break of 2.0% or more.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222361952.9U CN217879762U (en) | 2022-09-06 | 2022-09-06 | Steel-plastic composite belt for submarine cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222361952.9U CN217879762U (en) | 2022-09-06 | 2022-09-06 | Steel-plastic composite belt for submarine cable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217879762U true CN217879762U (en) | 2022-11-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222361952.9U Active CN217879762U (en) | 2022-09-06 | 2022-09-06 | Steel-plastic composite belt for submarine cable |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217879762U (en) |
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2022
- 2022-09-06 CN CN202222361952.9U patent/CN217879762U/en active Active
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