Dynamic composite cable for deep sea operation of diving robot

Abstract

The utility model belongs to the technical field of cables, and particularly relates to a dynamic composite cable for deep sea operation of a diving robot. The cable comprises a central filling member, a composite cable core and a protective layer which are arranged from inside to outside. The composite cable core is arranged on the outer side of the center filling piece and comprises a plurality of power cable cores, auxiliary cable cores and winding wires which are sequentially arranged from inside to outside, the power cable cores are arranged around the center filling piece in the circumferential direction, and gaps between the power cable cores and the protective layer are filled with the auxiliary cable cores in the circumferential direction at intervals; gaps among the power cable core, the auxiliary cable core and the protective layer are filled with winding wires in the circumferential direction at intervals, and the outer side of the winding wires is coated with a semi-conductive layer; the protective layer comprises an armored shielding layer in contact with the semi-conductive layer and an outer sheath layer arranged on the outer side of the armored shielding layer. The utility model is used for solving the problem that the existing umbilical cable is poor in tensile and compression resistance.

Description

Technical Field

[0001] The utility model belongs to the technical field of cables, and in particular relates to a dynamic integrated cable for deep-sea operations of a diving robot. Background Art

[0002] With the rapid development of machine intelligence, the trend toward intelligent robots replacing human workers is growing. This is particularly true for intelligent devices used in the underwater equipment industry, a specialized application in complex deep-sea environments. These devices place extremely high demands on cables. Underwater equipment typically includes, but is not limited to, underwater video capture, data collection and sampling, small-scale drilling, and the repair and maintenance of offshore and subsea structures.

[0003] An umbilical cable is a combination of electrical cables, optical cables, and hydraulic or chemical hoses. Umbilicals are generally divided into dynamic and static umbilicals. Dynamic umbilicals connect upper floating platforms to underwater equipment, providing power, monitoring, and control data signals to these facilities. Marine cable structures, which incorporate multiple optical and electrical components, are typically non-bonded composite structures. Under the influence of floating body motion and marine environmental loads, the umbilical cable undergoes geometric deformation, gradually reducing the cable's compressive and tensile strength, as well as its bending stiffness. This can lead to technical issues such as signal interference and poor compressive and tensile strength during deep-sea service. Utility Model Content

[0004] The technical problem to be solved by the present invention is to overcome the deficiencies of the existing technology and provide a dynamic integrated cable for deep-sea operations of a diving robot, so as to solve the problem that the current umbilical cable has poor tensile and compressive resistance.

[0005] The technical solution of the utility model to solve the above technical problems is as follows: a dynamic composite cable for deep-sea operations of a submersible robot, which includes a central filling piece, a composite cable core and a protective layer arranged from the inside to the outside;

[0006] The composite cable core is arranged outside the central filling piece, and the composite cable core includes a plurality of power cable cores, auxiliary cable cores and winding wires arranged in sequence from the inside to the outside. The power cable cores are circumferentially arranged around the central filling piece, the auxiliary cable cores are circumferentially filled in the gap between the power cable core and the protective layer, and the winding wires are circumferentially filled in the gaps between the power cable core, the auxiliary cable core and the protective layer, and the outer side of the winding wire is coated with a semi-conductive layer;

[0007] The protective layer includes an armor shielding layer in contact with the semiconductive layer, and an outer sheath layer arranged outside the armor shielding layer.

[0008] Compared with the existing technology, the above technical solution has the following beneficial effects:

[0009] A central filler is set at the center of the composite cable to improve the ability to resist tension and compression. Various cable cores are arranged in sequence from the inside to the outside of the composite cable core. The outer cable core fills the gap formed by the circumference of the inner cable core in turn, thereby improving the tightness and roundness of the entire cable core and ensuring the stability of the cable core in a dynamic environment. At the same time, the armored shielding layer can not only provide a good internal balance of mechanical stress, but also utilize the winding wire to contact the armored shielding layer to prevent external electromagnetic interference and signal loss, thereby ensuring the integrity of data transmission.

[0010] The auxiliary cable core includes at least one optical cable core and a plurality of control cable cores. The optical cable core includes a multi-core optical fiber group, a metal protection tube and a polyethylene sheath layer which are sequentially arranged from the inside to the outside.

[0011] The armored shielding layer includes a metal shielding layer wrapped around the outside of the composite cable core, the metal shielding layer is a tinned copper tape shielding layer, and the wrapping overlap rate of the tinned copper tape shielding layer is not less than 10%.

[0012] The armored shielding layer also includes a metal armor layer arranged on the outside of the metal shielding layer. The metal armor layer is a galvanized steel wire braided armor layer, and the braiding density of the galvanized steel wire braided armor layer is not less than 82%.

[0013] The diameter of a single wire in the galvanized steel wire braided armor layer is not less than 0.2 mm.

[0014] The winding wires are provided in a number of groups corresponding to the number of the power cable cores, and each group of the winding wires is evenly spaced circumferentially between two power cable cores to maintain potential balance.

[0015] There are two winding wires in each group, and the two winding wires are respectively filled between the auxiliary cable core and the power cable core.

[0016] The conductors in the power cable core and the control cable core are both Class II conductors. The insulation layer wrapped around the outside of the conductors in the power cable core and the control cable core is a cross-linked polyethylene insulation layer. The conductors of the power cable core are regularly twisted in forward and reverse directions, and the conductors of the control cable core are regularly twisted in the same direction.

[0017] The outer sheath layer is a high-density polyethylene outer sheath layer.

[0018] Water-blocking paste is arranged in the gaps of the composite cable core. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0020] Figure 1 It is a structural diagram of the present utility model.

[0021] Reference numerals:

[0022] 1. Center filling piece;

[0023] 2. Conductor in the power cable core; 3. Insulation layer of the power cable core; 4. Conductor in the control cable core; 5. Insulation layer of the control cable core;

[0024] 6. Winding wire; 7. Semi-conductive layer; 8. Optical cable core;

[0025] 9. Water-blocking cream;

[0026] 10. Metal shielding layer; 11. Metal armor layer; 12. Outer sheath layer. DETAILED DESCRIPTION

[0027] The following embodiments of the technical solution of the present invention are described in detail with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention and are therefore only examples and are not intended to limit the scope of protection of the present invention.

[0028] It should be noted that, unless otherwise specified, the technical terms or scientific terms used in this application should have the common meanings understood by those skilled in the art to which this utility model belongs.

[0029] In addition, the terms "first," "second," etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. In the description of this utility model, "plurality" means more than two, unless otherwise specifically defined.

[0030] In this application, unless otherwise expressly specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0031] like Figure 1 As shown, the utility model provides a dynamic integrated cable for deep-sea operations of a diving robot, which includes a central filling piece, a composite cable core and a protective layer arranged from the inside to the outside; it has the excellent characteristics of small outer diameter, light weight, pressure resistance, wear resistance, waterproofness, tear resistance, and fast data transmission speed.

[0032] Among them, the central filling piece is cylindrical and made of PET. It has good softness, wear resistance and corrosion resistance, and can resist stretching and compression.

[0033] The composite cable core is arranged outside the central filling piece, and the composite cable core includes a plurality of power cable cores, auxiliary cable cores and winding wires arranged in sequence from the inside to the outside. The power cable cores are circumferentially arranged around the central filling piece, and the auxiliary cable cores are circumferentially filled in the gap between the power cable core and the protective layer. The winding wires are circumferentially filled in the gaps between the power cable core, the auxiliary cable core and the protective layer. The outer side of the winding wire is covered with a semi-conductive layer, which can be made of semi-conductive PE material;

[0034] There are three power cable cores in the composite cable core, and a central filler is placed in the center to increase the tightness, roundness and flexibility of the cable core;

[0035] Three power cable cores are arranged in the center of the cable in a symmetrical equilateral triangle. At the same time, three auxiliary cable cores are also arranged in a symmetrical inverted triangle. They are arranged at intervals with the three power cables and fill the gaps in the outer layer of the power cable core. The cross-sectional distribution of the composite cable core adopts an equilateral triangle design, which has a firm structure, improves the hydrodynamic stability of the cable core in a dynamic environment, and reduces the outer diameter of the cable.

[0036] Water-blocking paste is applied to the gaps within the composite cable core. This paste is injected using a glue gun. The injection pressure can be adjusted to meet varying viscosity requirements. Positioning the glue gun at a 45° angle to the cable core ensures the water-blocking paste is injected into the gaps within the cable core, resolving the issue of glue coating processes that prevent full coverage of the gaps. This ensures the cable's tightness while also enhancing its water-blocking properties.

[0037] The protective layer includes an armor shielding layer in contact with the semiconductive layer, and an outer sheath layer arranged outside the armor shielding layer.

[0038] A central filler is set at the center of the composite cable to improve the ability to resist tension and compression. Various cable cores are arranged in sequence from the inside to the outside of the composite cable core. The outer cable core fills the gap formed by the circumference of the inner cable core in turn, thereby improving the tightness and roundness of the entire cable core and ensuring the stability of the cable core in a dynamic environment. At the same time, the armored shielding layer can not only provide a good internal balance of mechanical stress, but also utilize the winding wire to contact the armored shielding layer to prevent external electromagnetic interference and signal loss, thereby ensuring the integrity of data transmission.

[0039] Among them, the auxiliary cable core includes at least one optical cable core and several control cable cores. In this embodiment, there are two control cable cores and one optical cable core. The optical cable core includes a multi-core optical fiber group, a metal protective tube and a polyethylene sheath layer arranged in sequence from the inside to the outside. The metal protective cover can be a stainless steel tube, which is protected by mechanical protection of the steel tube to prevent optical path signal attenuation caused by excessive stretching and bending.

[0040] The armored shielding layer includes a metal shielding layer wrapped around the outside of the composite cable core. The metal shielding layer is a tinned copper tape shielding layer with an overlap rate of no less than 10%. The metal shielding layer is in close contact with the semi-conductive layer on the inside where the winding wires are placed. This can prevent external electromagnetic interference and signal loss, ensuring the integrity of data transmission.

[0041] In this embodiment, three groups of winding wires are provided corresponding to the number of the power cable cores. Each group of winding wires is evenly spaced circumferentially between two power cable cores to maintain potential balance. Specifically, two winding wires are provided in each group of winding wires, and the two winding wires are respectively filled between the auxiliary cable core and the power cable core. On the one hand, they fill the gap between the outermost auxiliary cable core and the power cable core and the protective layer to ensure roundness. On the other hand, the six winding wires can ensure potential balance.

[0042] The winding wire is made of tin-plated material to ensure corrosion resistance and avoid electrochemical reaction with the metal armor layer;

[0043] The semi-conductive layer on the outside of the winding wire is an insulating layer, which is made of PE material. The semi-conductive PE protects the wire core and has good conductivity, which can eliminate static electricity.

[0044] The armored shielding layer further includes a metal armor layer arranged outside the metal shielding layer, wherein the metal armor layer is a galvanized steel wire braided armor layer, and the braiding density of the galvanized steel wire braided armor layer is not less than 82%;

[0045] Specifically, the diameter of the individual filaments in the galvanized steel wire braided armor layer is no less than 0.2 mm, giving the cable improved wear resistance and flexibility, making it suitable for bending and moving applications. Furthermore, the braided armoring method provides good electromagnetic shielding and balances mechanical stress within the cable.

[0046] In this embodiment, the conductors in the power cable core and the control cable core are both Class II conductors, and are twisted in a regular manner arranged in an arithmetic progression from the inside out, with the outermost layers all in the left direction. The insulation layer wrapped around the outside of the conductor in the power cable core and the control cable core is a cross-linked polyethylene insulation layer, which has good electrical properties and mechanical strength. The conductors of the power cable core are twisted in regular forward and reverse directions, and the conductors of the control cable core are twisted in regular unidirectional directions. The control cable core is placed in the gap between the power cable cores, and the conductors in the control cable core are twisted in regular unidirectional directions. The advantage is that compared with forward and reverse twisting, the outer diameter of the conductor can be reduced, the gap between the power cable core can be filled more densely, and the roundness of the cable can be improved.

[0047] The outer sheath layer is a high-density polyethylene outer sheath layer. HDPE is a high-density polymer material with good corrosion resistance and waterproof properties, which can effectively prevent moisture from penetrating into the cable. It also has good rigidity and hardness.

[0048] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. Dynamic integrated cable for deep-sea operation of diving robots, characterized by: It includes a central filling piece, a composite cable core and a protective layer arranged from the inside out; The composite cable core is arranged outside the central filling piece, and the composite cable core includes a plurality of power cable cores, auxiliary cable cores and winding wires arranged in sequence from the inside to the outside. The power cable cores are circumferentially arranged around the central filling piece, the auxiliary cable cores are circumferentially filled in the gap between the power cable core and the protective layer, and the winding wires are circumferentially filled in the gaps between the power cable core, the auxiliary cable core and the protective layer, and the outer side of the winding wire is coated with a semi-conductive layer; The protective layer includes an armor shielding layer in contact with the semiconductive layer, and an outer sheath layer arranged outside the armor shielding layer; The winding wires are provided in a number of groups corresponding to the number of the power cable cores, and each group of the winding wires is evenly spaced circumferentially between two power cable cores to maintain potential balance; There are two winding wires in each group, and the two winding wires are respectively filled between the auxiliary cable core and the power cable core.

2. The dynamic integrated cable according to claim 1, characterized in that: The auxiliary cable core includes at least one optical cable core and a plurality of control cable cores. The optical cable core includes a multi-core optical fiber group, a metal protection tube and a polyethylene sheath layer which are sequentially arranged from the inside to the outside.

3. The dynamic integrated cable according to claim 1, characterized in that: The armored shielding layer includes a metal shielding layer wrapped around the outside of the composite cable core, the metal shielding layer is a tinned copper tape shielding layer, and the wrapping overlap rate of the tinned copper tape shielding layer is not less than 10%.

4. The dynamic integrated cable according to claim 3, characterized in that: The armored shielding layer also includes a metal armor layer arranged on the outside of the metal shielding layer. The metal armor layer is a galvanized steel wire braided armor layer, and the braiding density of the galvanized steel wire braided armor layer is not less than 82%.

5. The dynamic integrated cable according to claim 4, characterized in that: The diameter of a single wire in the galvanized steel wire braided armor layer is not less than 0.2 mm.

6. The dynamic integrated cable according to claim 2, characterized in that: The conductors in the power cable core and the control cable core are both Class II conductors, and the insulation layers wrapped around the outside of the conductors in the power cable core and the control cable core are both cross-linked polyethylene insulation layers. The conductors of the power cable core are twisted in regular forward and reverse directions, and the conductors of the control cable core are twisted in regular directions.

7. The dynamic integrated cable according to claim 6, characterized in that: The outer sheath layer is a high-density polyethylene outer sheath layer.

8. The dynamic integrated cable according to claim 1, characterized in that: Water-blocking paste is arranged in the gaps of the composite cable core.

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