CN112735655B - Marine towing rope - Google Patents

Abstract

The present invention provides a marine streamer, which includes a load-bearing unit, a plurality of core units, a first protective layer, a fiber layer and a second protective layer arranged sequentially from the inside to the outside, the multiple cores The units are distributed at intervals in the circumferential direction of the load-bearing unit; a first water-blocking layer is also filled between the first protective layer and the load-bearing unit, and the first water-blocking layer and the first protective layer Fixed connection. The marine tow cable provided by the invention has better waterproof performance.

Description

ocean streamer

technical field

The invention relates to the technical field of cables, in particular to a marine streamer.

Background technique

Ocean streamers are often used to explore the seabed to collect information such as seismic sources and energy distribution on the seabed.

The ocean streamer includes usually a plurality of core units and a wrapping layer, a protective layer and a load-bearing layer surrounding the plurality of cell units. The gap in the wrapping layer is also filled with a water-blocking layer to avoid water seepage of the core unit. The wrapping layer surrounds the water blocking layer, which can make the water blocking layer more round. The protective layer makes the ocean streamer have better tear resistance. The load-bearing layer is a steel wire armor layer, which is used to withstand the tension and torsion of the ocean towline.

However, the wrapping layer is easily separated from the protective layer and the water-blocking layer, resulting in water seepage and poor waterproof performance of the cable.

Contents of the invention

In view of the above problems, an embodiment of the present invention provides a marine streamer with better waterproof performance.

In order to achieve the above purpose, embodiments of the present invention provide the following technical solutions:

An embodiment of the present invention provides a marine streamer, which includes a load-bearing unit, a plurality of core units, a first protective layer, a fiber layer and a second protective layer arranged in sequence from the inside to the outside, and the plurality of core units Distributed at intervals in the circumferential direction of the load-bearing unit; a first water-blocking layer is also filled between the first protective layer and the load-bearing unit, and the first water-blocking layer is fixed to the first protective layer connected.

Compared with the prior art, the ocean streamer provided by the embodiment of the present invention has the following advantages: by arranging the load-bearing unit inside the ocean streamer, the load-bearing unit can be protected to prevent the load-bearing unit from being impacted or worn by external force In case of breakage, the service life of the marine streamer is improved. And because the load-bearing unit is arranged at the center of the ocean towline, testers can conveniently install testing equipment at any position along the length of the ocean towline, which is convenient to use. By forming the first protective layer directly outside the first water blocking layer, and the first protective layer is fixedly connected to the water blocking layer, there is no gap between the two, so as to avoid separation and water seepage between the first water blocking layer and the first protective layer, Improved waterproofing of ocean streamers.

In some optional embodiments, the first water blocking layer and the first protective layer are bonded and fixed during solidification and molding.

In some optional embodiments, any two adjacent core units are arranged at intervals along the circumference of the ocean streamer, and the load-bearing unit, the core unit and the first protective layer arranged at intervals along the radial direction of the ocean streamer.

In some optional implementation manners, the core unit includes a power supply unit and a data unit for transmitting signals.

In some optional embodiments, the wire core unit includes a first wire core, a second water blocking layer and a wrapping layer arranged sequentially from inside to outside; the inner and outer sides of the wrapping layer are respectively connected to the The second water blocking layer is fixedly connected to the first water blocking layer.

In some optional implementation manners, the core unit further includes a grounding unit.

In some optional implementation manners, the grounding unit includes a second wire core, a semiconductive layer and a third protective layer arranged in sequence from inside to outside.

In some optional embodiments, the first protective layer is a foamed part.

In some optional embodiments, the density of the first protective layer is less than or equal to 0.7 g/cm ³ .

In some optional embodiments, the bearing unit includes fiber bundles and a fourth protective layer surrounding the fiber bundles, and the fourth protective layer is fixedly connected with the first water blocking layer.

In some optional implementation manners, the plurality of core units at least include a power supply unit, a ground unit, and a data unit for transmitting signals.

In some optional implementation manners, the plurality of core units further include an optical fiber communication unit.

In some optional embodiments, a plurality of protective protrusions are provided on the outer wall of the second protective layer, and the plurality of protective protrusions are arranged at intervals along the circumferential direction of the second protective layer, and each of the protective protrusions The protective protrusions all extend along the length direction of the ocean towline.

In some optional embodiments, the circumferential distance between two adjacent protection protrusions is greater than the protrusion width of the protection protrusions.

In addition to the technical problems solved by the embodiments of the present invention described above, the technical features that constitute the technical solutions, and the beneficial effects brought by the technical features of these technical solutions, other problems that the ocean streamers provided by the embodiments of the present invention can solve The technical problems, other technical features included in the technical solution, and the beneficial effects brought by these technical features will be further described in detail in the specific implementation.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description These are some embodiments of the present invention. Those skilled in the art can also obtain other drawings based on these drawings without creative work.

Fig. 1 is the structural schematic diagram of the marine streamer that the embodiment of the present invention provides;

Fig. 2 is a schematic structural diagram of an ocean streamer provided by an embodiment of the present invention when external detection equipment is connected.

Reference signs:

1: ocean streamer;

10: bearing unit; 11: fiber bundle; 12: fourth protective layer;

20: core unit; 21: first core; 22: second water blocking layer; 23: wrapping layer; 24: filling core; 25: second core; 26: semi-conductive layer; 27: third protective layer ; 210: power supply unit; 220: grounding unit; 230: data unit;

30: the first protective layer;

40: fiber layer;

50: the second protective layer; 51: protective protrusions;

60: the first water blocking layer;

70: Testing equipment.

Detailed ways

In order to make the above objects, features and advantages of the embodiments of the present invention more obvious and understandable, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Apparently, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

In the prior art, a wrapping layer is provided between the water blocking layer and the protective layer to make the water blocking layer more round. However, the wrapping layer and the protective layer cannot be tightly connected, and the wrapping layer and the protective layer are easily separated from each other due to the torsion and stretching of the ocean towline. Once the protective layer is damaged or the end of the ocean towline is damaged, the seawater will The separation gap enters and damages the external equipment on the overall cable and even damages the terminal equipment. The water resistance of the marine tow cable is poor.

In view of this, in the embodiment of the present application, the water-blocking layer is directly bonded and fixed to the protective layer, and there is no gap between the two, so as to avoid water infiltration and improve the water-blocking performance of the ocean streamer.

Fig. 1 is a schematic structural diagram of a marine streamer provided by an embodiment of the present invention. Fig. 2 is a schematic structural diagram of an ocean streamer provided by an embodiment of the present invention when external detection equipment is connected.

Please refer to Fig. 1 and Fig. 2, the present embodiment provides a marine streamer 1, which includes a load-bearing unit 10, a plurality of core units 20, a first protective layer 30, a fiber layer 40 and In the second protective layer 50, a plurality of core units 20 are distributed at intervals in the circumferential direction of the load-bearing unit 10; between the first protective layer 30 and the load-bearing unit 10, a first water-blocking layer 60 is also filled, and the first water-blocking layer 60 is fixedly connected with the first protection layer 30 .

Specifically, the load-bearing unit 10 is used to bear the stretching, torsion, etc. of the ocean streamer 1 to prevent the ocean streamer 1 from breaking. The load-bearing unit 10 is located at the center of the ocean streamer 1, and it will not be damaged by seawater erosion or impact by foreign objects. In this way, even if the outer layer of the ocean streamer 1 is damaged, the load-bearing unit 10 located in the center will not break or fail, which is easy to maintain and improves the service life of the ocean streamer 1 .

A plurality of core units 20 surround the outer side of the load-bearing unit 10 along the circumferential direction of the ocean streamer 1 . In some optional implementation manners, the plurality of core units 20 at least include a power supply unit 210 , a ground unit 220 and a data unit 230 for transmitting signals. Among them, the ocean streamer 1 is usually connected with various detection devices, such as geophones and the like. The power supply unit 210 is used to supply power to the detection equipment connected to the ocean streamer 1 . The grounding unit 220 grounds the detection equipment, derives the residual electric field in the ocean streamer 1, and protects the detection equipment and terminal equipment. The data unit 230 is used for transmitting control signals and inputting data information. In some optional implementation manners, the plurality of core units 20 also include an optical fiber communication unit, which has a larger signal transmission capacity.

Wherein, the number of the power supply unit 210 , the ground unit 220 , the data unit 230 and the optical fiber communication unit can be set as required. Exemplarily, the number of grounding units 220 may be two, the number of data units 230 may be two, the number of power supply units 210 may be four, and the number of optical fiber communication units may be one, which is not limited in this embodiment.

The first protection layer 30 surrounds the outer sides of the plurality of core units 20 and is used to form protection for the plurality of core units 20 . It can be made of hard elastic material, such as polyurethane, which has good compression resistance and resilience, and good sound transmission effect, and the detection effect of detection equipment such as a geophone is good.

The fiber layer 40 is arranged outside the first protective layer 30 to improve the torsion resistance and tear resistance of the ocean streamer 1 . The fiber layer 40 can be aramid fiber, aramid fiber, etc., and has high strength.

The second protective layer 50 surrounds the fiber layer 40, which can directly contact with sea water or be impacted by foreign objects. It can be made of high-hardness material, such as polyurethane, which has strong wear resistance and good tear resistance, and can form a good protection for the ocean streamer 1 .

Moreover, the materials of the first protective layer 30 and the second protective layer 50 are compatible. In the process of making the ocean streamer 1, the materials of the first protective layer 30 or the second protective layer 50 can be bonded to each other through the fiber layer 40 to avoid the second The first protective layer 30 and the fibrous layer 40, and the fibrous layer 40 and the second protective layer 50 are separated from each other, resulting in penetration of moisture. Moreover, the first protective layer 30 , the fiber layer 40 and the second protective layer 50 are fixedly connected to each other, which enhances the tear resistance and torsion resistance of the ocean streamer 1 .

Wherein, a first water-blocking layer 60 is filled between the first protective layer 30 and the load-bearing unit 10, that is, each core unit 20 is wrapped with a water-blocking material to prevent moisture from penetrating into the core through the first protective layer 30. In the unit 20, the water blocking performance of the ocean streamer 1 is relatively good. At the same time, the first water blocking layer 60 is distributed along the length direction of the ocean streamer 1 , and plays the role of water blocking in the longitudinal direction of the ocean streamer 1 .

The first water-blocking layer 60 can be made of a high-performance water-blocking material, which has strong toughness and viscosity, and can be effectively bonded and fixed with the core unit 20, the load-bearing unit 10 and the first protective layer 30 to avoid separation. .

In some optional embodiments, the first water blocking layer 60 and the first protective layer 30 are bonded and fixed during solidification and molding. When the ocean streamer 1 is formed, the first water blocking layer 60 is filled and formed through a high-temperature filling process. At this time, the first water blocking layer 60 has not been cooled and formed, and it still has viscosity and fluidity. type film, so that the first water blocking layer 60 has better roundness. Then the first protective layer 30 can be extruded while peeling off the release film. In this way, the first water-blocking layer 60 and the first protective layer 30 that still have viscosity are bonded and fixed to each other, and since the first water-blocking layer 60 and the first protective layer 30 still have fluidity, the two can fill the gap at the molding position. gap. In this way, after the marine streamer 1 is formed, the first water blocking layer 60 and the first protective layer 30 are firmly bonded, and there is no gap between the two, avoiding the gap between the first water blocking layer 60 and the first protective layer 30. The separation and water infiltration of the ocean streamer 1 have a higher water resistance.

It can be understood that during the forming process of the first water blocking layer 60 and the first protective layer 30, the first water blocking layer 60 and the first protective layer 30 flow and merge with each other, and the boundary between the two is not a round cylindrical surface . As long as the first water blocking layer 60 can completely wrap the multiple core units 20 . Exemplarily, if the first water blocking layer 60 and the first protective layer 30 have a rounded boundary, the boundary line between the first water blocking layer 60 and the first protective layer 30 can be shown by the dotted line shown in FIG. 1 As shown, the radial size of the first water blocking layer 60 is larger than the outer edge size of the core unit 20 .

It can be understood that when the load-bearing unit 10 of the ocean streamer 1 is arranged on the outer layer, for example, the steel wire armor layer is located at the outermost layer of the ocean streamer 1, then, when it is necessary to connect external detection equipment on the ocean streamer 1, only The detection equipment can be connected at the joint of two adjacent marine streamers 1, which is inconvenient to use. In the embodiment of the present application, by arranging the load-bearing unit 10 at the central part of the ocean streamer 1, and setting the core unit 20 on the outside of the load-bearing unit 10 in the radial direction, it is convenient to move the ocean streamer 1 along the length direction. External detection equipment can be connected to any part without damaging the load-bearing unit 10, which is convenient to use and has high flexibility.

Specifically, the operation method of the external detection device is as follows:

Firstly, the location to be processed of the external detection equipment on the ocean streamer 1 is selected.

The second protective layer 50, the fiber layer 40, and the first protective layer 30 at the position to be treated are peeled off in sequence, and the first water blocking layer 60 at the position to be treated is removed to expose the core unit at the position to be treated 20. According to the wiring principle of the testing equipment, the wire core unit 20 and the testing equipment are welded and insulated.

Since the detection equipment generally has a HALF structure, after the wiring process is completed, the detection equipment is combined and wrapped on the core unit 20 to be connected.

Clean up the impurities on the second protective layer 50 at the two ends of the position to be treated, and pour vulcanized material at the position to be treated by means of injection molding or molding, so that it can be mixed with the polyurethane on the second protective layer 50 at both ends of the position to be treated. Full contact; maintain the set time at the vulcanization temperature until complete vulcanization, and remove the mold to complete the processing flow of the external testing equipment.

In some optional embodiments, any two adjacent core units 20 are arranged at intervals along the circumference of the ocean streamer 1, and the load-bearing unit 10, the core unit 20 and the first protective layer 30 are arranged along the ocean streamer 1. Radial spacing settings. That is to say, along the circumferential direction of the core unit 20 , two adjacent core units 20 are arranged at intervals, thereby avoiding friction and wear between the core units 20 and between the core unit 20 and the bearing unit 10 . At the same time, the outer periphery of the core unit 20 is wrapped with a water-blocking material to protect the core unit 20 .

In some optional embodiments, the structure of the power supply unit 210 and the data unit 230 are similar, they both include the first wire core 21, the second water blocking layer 22 and the wrapping layer 23 arranged in sequence from the inside to the outside; the wrapping The inner and outer sides of the layer 23 are fixedly connected with the second water blocking layer 22 and the first water blocking layer 60 respectively.

The quantity and type of the first wire cores 21 can be set according to the requirements of the power supply unit 210 and the data unit 230, so as to adapt to the use of different detection devices. Among them, the core unit 20 is provided with a second water blocking layer 22 and a wrapping layer 23. Even if the detection equipment is externally connected to the ocean streamer 1, the second water blocking layer 22 and the second protective layer 50 can be connected with the detection equipment. The vulcanized seal between them realizes radial water blocking.

That is to say, by providing the first water-blocking layer 60 in the ocean streamer 1 and the second water-blocking layer 22 in the wire core unit 20, various water-blocking effects of the ocean streamer 1 are realized, and the waterproof performance is relatively high. good.

Exemplarily, the data unit 230 may include four first wire cores 21 of the same specification, and the four first wire cores 21 are arranged along the circumference of the data unit 230 . The four first wire cores 21 are wrapped with the wrapping layer 23 , and the gaps between the first wire cores 21 in the wrapping layer 23 are filled with the second water blocking layer 22 .

In order to make the data unit 230 more round, a filling core 24 is provided inside the four first cores 21 , that is, the filling core 24 is located at the center of the data unit 230 .

The first core 21 includes a conductor and an insulating sheath covering the conductor. The conductor can be oxygen-free copper, tin-plated copper, silver-plated copper, etc. Optionally, the conductor in this embodiment is formed by twisting a plurality of five types of silver-plated copper. The silver-plated copper has good electrical conductivity, which can effectively reduce the heating efficiency of the conductor. The silver-plated copper also has solderability, so as to facilitate the welding between the testing equipment and the first core 21 when the testing equipment is connected externally. Silver-plated copper also has good corrosion resistance, avoiding the seawater corrosion of conductors at the position of external detection equipment. The material of the insulating sheath can be polyolefin material, and the insulating performance is better.

The material of the wrapping layer 23 can be a wrapping tape compatible with the water-blocking material, which can make the data unit 230 relatively round and convenient for turnover, and the wrapping tape of this material is bonded to the first water-blocking layer and the second water-blocking layer. The knot is better, avoiding the possibility of water penetration in the separation gap.

Each first core 21 and the filling core are spaced apart, and the second water-blocking layer 22 is filled in the gap in the wrapping layer 23, so that the outer circumference of each first core 21 and the filling core is wrapped with a water-blocking material , so as to form protection for each first core 21 . It is also beneficial to disperse the first wire cores 21 when external detection equipment is connected, and the material of the second water blocking layer 22 can be the same as that of the first water blocking layer 60 , which is not limited in this embodiment.

According to the power demand of the detection device, the power supply unit 210 may also include four first wire cores 21 . And the four first wire cores 21 include two large wire cores with larger diameters and two small wire cores with smaller diameters, and the large wire cores and the small wire cores are sequentially arranged at intervals along the circumferential direction of the power supply unit 210 . The wrapping layer 23 surrounds the two large wire cores and the two small wire cores, and the gap between the first wire cores 21 in the wrapping layer 23 is filled with the second water blocking layer 22 . Due to the different diameters of the large wire core and the small wire core, the gap at the center of the power supply unit 210 is small, so no filling core may be provided. The material and structure of the large wire core and the small wire core are similar to those of the first wire core 21 in the data unit 230 , and will not be repeated in this embodiment.

It can be understood that the structure of the grounding unit 220 may be similar to that of the data unit 230 and the power supply unit 210 .

In some optional implementation manners, the grounding unit 220 may not be provided with the second water blocking layer 22 . Exemplarily, the grounding unit 220 includes a second wire core 25 , a semiconductive layer 26 and a third protective layer 27 . Wherein, the structure and function of the first wire core 21 are similar to those of the above-mentioned embodiments, and will not be repeated in this embodiment.

The material of the semiconductive layer 26 may be semiconductive polyolefin, which can make the electric field distribution on the inner and outer sides of the second core 25 relatively uniform.

The material of the third protective layer 27 can be polypropylene with low toughness, and it will not bond with the semiconductive layer 26 after being extruded on the outside of the semiconductive layer 26 . When the detection device is connected externally, the third protective layer 27 can be easily broken and peeled off to expose the inner semiconductive layer 26 and the second wire core 25 .

Of course, when the outer diameter of the grounding unit 220 is significantly smaller than the data unit 230 and the power supply unit 210, the thickness of the third protective layer 27 in the grounding unit 220 can be increased to fill it, so that the data unit 230, the power supply unit 210, The outer diameters of the grounding units 220 are approximately the same or equal. In this way, the ocean streamer 1 has a relatively round appearance and is easy to form.

In some optional embodiments, the first protection layer 30 is a foamed part. For example, foamed polyurethane, in this way, a honeycomb or porous structure can be formed in the first protective layer 30 .

For the first protective layer 30 of the same thickness, the weight of the first protective layer 30 after foaming becomes smaller, and the specific gravity (ratio of weight to volume) of the ocean streamer 1 decreases, such as less than the density of water, which can make the ocean The gravity of the streamer 1 is close to the buoyancy of the ocean streamer 1 , so that the ocean streamer 1 is at the same elevation as possible to avoid being pulled by the detection equipment. At the same time, the stress of the bearing unit 10 is reduced and the service life is longer.

According to the requirements of use, the specific gravity of the ocean streamer 1 can be greatly reduced by increasing the thickness of the first protective layer 30 during the forming process of the ocean streamer 1 . Exemplarily, when the first protective layer 30 is at a preset thickness, the ocean streamer 1 may be in a floating state for water surface towing.

In some optional embodiments, the density of the first protective layer 30 is less than or equal to 0.7 g/cm ³ .

In some optional embodiments, the bearing unit 10 includes a fiber bundle 11 and a fourth protective layer 12 surrounding the fiber bundle 11 , and the fourth protective layer 12 is fixedly connected with the first water blocking layer 60 .

Wherein, the material of the fiber bundle 11 can be aramid fiber, PBO (poly-p-phenylene benzobisoxazole fiber, Poly-p-phenylene benzobisoxazole) fiber and other high-strength fibers, which have high tensile strength. At the same time, the weight of the fiber bundle 11 is small. Compared with the load-bearing unit of the steel wire material in the prior art, the load-bearing unit of the steel wire material is difficult to realize the production of large length because of its large dead weight. The load-bearing unit 10 in the present embodiment The weight of the ocean streamer 1 can be reduced, and the production of a larger length can be realized, while the bending performance of the fiber bundle is better.

The fourth protective layer 12 can be made of polyurethane, vulcanized rubber, polyester rubber (TPEE) and other materials with waterproof and easy-to-vulcanize properties, so as to prevent the fiber bundle 11 from entering water. At the same time, when the fiber bundle 11 of the ocean streamer 1 is connected to the bearing head, vulcanization sealing can be performed at the connection position to prevent water from entering the connection position.

Specifically, the forming process of the load-bearing unit 10 is as follows: the fibers are twisted into a round fiber bundle 11 under tension, bound with two fiber threads, and finally the fourth protective layer 12 is extruded synchronously. Stranding, bundling and extrusion are all completed synchronously under the condition that the fibers have tension, so that the fiber bundle 11 has higher strength and better roundness.

During the exploration process, there are usually multiple ocean streamers 1 , so the torsion of the ocean streamers 1 , or the bonding and entanglement between two adjacent ocean streamers 1 may occur. The torsion of the ocean streamer 1 may cause the ocean streamer 1 to break, and the bonding and winding between two adjacent ocean streamers 1 will increase the crosstalk between the two adjacent ocean streamers 1 to a certain extent. signal attenuation, etc.

In some optional embodiments, a plurality of protective protrusions 51 are provided on the outer wall of the second protective layer 50, and the plurality of protective protrusions 51 are arranged at intervals along the circumferential direction of the second protective layer 50, and each protective protrusion 51 all extend along the length direction of the ocean streamer 1 .

In this way, even if the two ocean streamers 1 are wound or bonded together, the two ocean streamers 1 are in contact with the tip of the protective protrusion 51, and the distance between the two ocean streamers 1 is the protrusion of the protective protrusion 51 height, reducing crosstalk interference between two ocean streamers1.

The end of the protective protrusion 51 away from the marine streamer 1 can be rounded to avoid scratching or piercing the marine streamer 1 when the protective protrusion 51 contacts the marine streamer 1 .

At the same time, the protective protrusion 51 will not significantly increase the weight of the ocean streamer 1 , will not affect the sound transmission performance of the ocean streamer 1 , and has low cost. Furthermore, the protective protrusion 51 can also play an anti-wear effect. For example, the ocean streamer 1 will preferentially wear and tear with the protruding protective protrusion 51 during the towing process, which can protect the second protective layer 50. effect. And when the marine streamer 1 is twisted, the protective protrusion 51 will also be twisted correspondingly, so that it is easy for inspectors to observe the twisting degree of the marine streamer 1 so as to straighten the marine streamer 1 in time to avoid damage to the marine streamer 1 .

The protrusion height of the protection protrusion 51 can be set as required. In some optional embodiments, the circumferential distance between two adjacent protection protrusions 51 is greater than the protrusion width of the protection protrusions 51 .

In this way, even if the protective protrusions 51 between two ocean streamers 1 are inserted into each other, there is still a gap between two adjacent guard protrusions 51 , which reduces the crosstalk interference between the two ocean streamers 1 .

Each embodiment or implementation manner in this specification is described in a progressive manner, each embodiment focuses on the difference from other embodiments, and the same and similar parts of each embodiment can be referred to each other.

In the description of this specification, descriptions that refer to the terms "one embodiment", "some embodiments", "exemplary embodiments", "examples", "specific examples", or "some examples" etc. mean that the embodiments are combined A specific feature, structure, material, or characteristic described or exemplified is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the described specific features, structures, materials or characteristics may be combined in any suitable manner in any one or more embodiments or examples.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention, rather than limiting them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: It is still possible to modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the technical solutions of the various embodiments of the present invention. scope.

Claims (5)

1. The marine towline is characterized by comprising a bearing unit, a plurality of wire core units, a first protective layer, a fiber layer and a second protective layer which are sequentially arranged from inside to outside, wherein the plurality of wire core units are distributed at intervals in the circumferential direction of the bearing unit;

a first water-resisting layer is also filled between the first protective layer and the bearing unit, and the first water-resisting layer is fixedly connected with the first protective layer;

the first waterproof layer and the first protective layer are bonded and fixed in the solidification forming process;

the bearing unit comprises a fiber bundle and a fourth protective layer which is enclosed outside the fiber bundle, and the fourth protective layer is fixedly connected with the first water-resisting layer;

the first protective layer is a foaming piece; the density of the first protective layer is less than or equal to 0.7g/cm ³ ；

A plurality of protection bulges are arranged on the outer wall surface of the second protection layer, are arranged at intervals along the circumferential direction of the second protection layer, and each protection bulge extends along the length direction of the marine towing cable; the circumferential distance between two adjacent protective bulges is larger than the bulge width of the protective bulge;

the wire core unit comprises a grounding unit, and the grounding unit comprises a second wire core, a semiconductive layer and a third protective layer which are sequentially arranged from inside to outside; the material of the semiconductive layer is semiconductive polyolefin, and the material of the third protective layer is polypropylene.

2. The streamer of claim 1, wherein any adjacent two of the core units are spaced apart along the circumference of the streamer, and the load carrying units, the core units, and the first protective layer are spaced apart along the radial direction of the streamer.

3. A marine streamer as claimed in claim 1, wherein the core unit comprises a power supply unit and a data unit for conveying signals.

4. A marine streamer as claimed in claim 3, wherein the core unit comprises a first core, a second water barrier and a wrap, arranged in that order from inside to outside; and the inner side and the outer side of the wrapping layer are fixedly connected with the second water-resisting layer and the first water-resisting layer respectively.

5. The marine streamer of any one of claims 1-4, wherein the plurality of core units further comprises an optical fiber communication unit.

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