Cable for connecting shore power system

Abstract

The utility model discloses a cable for shore power system connection, which comprises a cable core and a first sheath used for wrapping the cable core, the cable core comprises a main power wire core, a ground wire core, an optical fiber unit, a monitoring wire and a filler, and the first sheath comprises an inner sheath, a waterproof layer and an outer sheath from inside to outside in sequence. The cable is reasonable in structural design, and has the following beneficial effects: the cable is resistant to tearing and bending, and can effectively prevent water; the three layers of water-blocking structures are arranged, and the inner sheath, the outer sheath and the water-blocking layer are arranged, so that the cable can be effectively prevented from being eroded by water under water or in a humid environment; the sheath is a TPU sheath, the material has super-strong wear resistance and more excellent low temperature resistance, the low temperature resistance can reach-50 DEG C, the tear strength is 80kN / m, the cracking of the sheath layer can be effectively prevented, and meanwhile, the material has flexibility resistance, oil resistance, hydrolysis resistance, weather resistance and the like.

Description

Technical Field

[0001] The utility model relates to the technical field of cables, in particular to a cable for connecting a shore power system. Background Art

[0002] In recent years, with the improvement of environmental awareness, the application of shore power system has become more and more widespread. Shore power system is the equipment used by ports to provide power to ships, including ship-borne devices and shore-based devices. Reasonable setting of shore power system can reduce fuel consumption and emissions during the period of ship berthing, and achieve the goals of "zero fuel consumption" and "zero emissions".

[0003] The ship shore power system usually consists of three parts, including the dock shore power supply, the ship shore power distribution equipment, and the shore power cable management system between the ship and the shore. After more than ten years of development, the ship shore power system has been widely used in China's shipping, shipbuilding and dock fields. At the end of 2018, China's Ministry of Transport issued the "Implementation Plan for Ship Air Pollutant Emission Control Areas" (hereinafter referred to as the "Plan"). The goal of the plan is to reduce atmospheric pollutants such as sulfur oxides, nitrogen oxides and particulate matter emitted by ships during navigation, operation and berthing. The purpose is to improve the air quality of port cities and improve the quality of life of port city residents. It is applicable to ships sailing, berthing and operating in the control area. The "Plan" has formulated a roadmap and timetable for the promotion and application of ship shore power.

[0004] Shore power supply technology means that when a ship is at port, the diesel generator on board is stopped and the loads on board are powered by the variable frequency power supply at the terminal through cables. Research on shore power technology has positive significance for energy conservation, emission reduction and the construction of green ports. It is an important measure to solve the problem of atmospheric pollution in port areas caused by docked ships.

[0005] At present, there is no unified technical standard for high-voltage and high-current connection devices, and further research on key technologies is needed to promote the localization and large-scale application of shore power technology. Utility Model Content

[0006] The utility model aims to provide a shore power system connection cable, which solves the problem that the shore power cable has poor bending property and poor wear resistance.

[0007] In order to achieve the above-mentioned purpose, the technical solution of the utility model provides a cable for connecting a shore power system, comprising a cable core and a first sheath for wrapping the cable core, the cable core comprising four types of wire cores, the four types of wire cores being a main power wire core, a ground wire core, an optical fiber unit and a monitoring wire, the cable core is also provided with a filler to fill the gaps between the wire cores, the four types of wire cores and the filler are wrapped into a cable by a first wrapping tape, namely the cable core; the first sheath is composed of an inner sheath, a waterproof layer and an outer sheath from the inside to the outside.

[0008] Furthermore, the cross-section of the cable core is a circular cross-section, and the number of the main power line cores is three.

[0009] Furthermore, the main power line core and the ground line core are both composed of a first conductor and a first insulating layer wrapping the first conductor; the first conductor is a Class 5 tinned conductor, and the first insulating layer is a cross-linked polyolefin insulating layer.

[0010] Furthermore, the optical fiber unit is a multimode optical fiber unit, and the multimode optical fiber unit includes 6 multimode optical fibers and a polyurethane sheath wrapping the multimode optical fibers.

[0011] Furthermore, the six multimode optical fibers include two multimode optical fibers with a diameter specification of 62.5 μm and four multimode optical fibers with a diameter specification of 125 μm.

[0012] Furthermore, the monitoring line includes an insulating cable core, and a second wrapping tape, a braided shielding layer, and a second sheath which are sequentially wrapped around the insulating cable core. A plurality of insulating wire cores are arranged in the insulating cable core.

[0013] Furthermore, six insulating cores are arranged in the insulating cable core, and the insulating core consists of a second conductor and a second insulating layer wrapping the second conductor; the second conductor is a Category 6 tinned copper wire composite 1000D bulletproof wire twisted together, and the insulating layer is a PE insulating layer.

[0014] Furthermore, the second wrapping tape is a polyester wrapping tape; the braided shielding layer is a tinned copper wire shielding layer, and the braiding density is ≥80%; and the second sheath is a thermoplastic elastomer sheath.

[0015] Furthermore, the filler is a waterproof filling rope, the first wrapping tape is a non-woven fabric wrapping tape, the waterproof layer is a water-blocking tape, and the inner sheath and the outer sheath are TPU sheaths.

[0016] In summary, the device structure of the utility model is reasonably designed, and the use of the technical solution of the utility model has the following beneficial effects: the cable of the utility model is not only tear-resistant and bending-resistant, but also effectively waterproof.

[0017] 1. The conductor adopts Category 5 and 6 tinned copper wire, which is twisted by multiple strands of tinned copper wire. The monitoring line conductor also adds 1000D bulletproof wire, which effectively improves its swing and bending performance and has good bending characteristics.

[0018] 2. The utility model is provided with a three-layer water-blocking structure, which is provided with an inner and outer sheath plus a water-blocking layer, which can effectively prevent the cable from being corroded by water underwater or in a humid environment.

[0019] 3. The sheath in the utility model is a TPU sheath, which has super wear resistance and better low temperature resistance, which can reach -50°C. The tear strength is 80kN / m, which can effectively prevent the cracking of the sheath layer. It also has bending resistance, oil resistance, hydrolysis resistance and weather resistance. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the cross-sectional structure of the cable for connecting the shore power system of the utility model;

[0021] Figure 2 It is a schematic diagram of the cross-sectional structure of the monitoring line of the utility model;

[0022] Explanation of the reference numerals: 1-main power line core; 2-ground line core; 3-filler; 4-optical fiber unit; 5-monitoring line, 501-second conductor, 502-second insulation layer, 503-second wrapping tape, 504-braided shielding layer, 505-second sheath; 6-first wrapping tape; 7-inner sheath; 8-waterproof layer; 9-outer sheath. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention, but this does not constitute a limitation on the protection scope of the present invention.

[0024] In the present invention, for a clearer description, the following explanation is made: the observer faces the attached Figure 1 For observation, the left front side of the observer is set as the front, the right rear side of the observer is set as the rear, the left rear side of the observer is set as the left, the right front side of the observer is set as the right, the top of the observer is set as the top, and the bottom of the observer is set as the bottom. It should be pointed out that the terms "front end", "rear end", "left side", "right side", "middle", "top", "bottom" and the like in the text indicate the orientation or position relationship based on the orientation or position relationship set in the drawings, which is only for the convenience of clearly describing the utility model, and does not indicate or imply that the structure or component referred to must have a specific orientation or be constructed in a specific orientation, and therefore cannot be understood as a limitation on the utility model. In addition, the terms "first", "second", "third", and "fourth" are only used for the purpose of clarifying or simplifying the description, and cannot be understood as indicating or implying relative importance or quantity.

[0025] See also Figure 1The technical solution of the utility model provides a shore power system connection cable, including a cable core and a first sheath for wrapping the cable core, the cable core includes four types of wire cores, the four types of wire cores are respectively a main power wire core 1, a ground wire core 2, an optical fiber unit 4 and a monitoring wire 5, the cable core is also provided with a filler 3 to fill the gaps between the wire cores, the four types of wire cores and the filler 3 are wrapped into a cable by a first wrapping tape 6, that is, the cable core; the first sheath is composed of an inner sheath 7, a waterproof layer 8, and an outer sheath 9 from the inside to the outside.

[0026] The cable core of the shore power system connection cable of the utility model includes four types of cores, which are respectively a main power core 1, a ground core 2, an optical fiber unit 4 and a monitoring line 5; the main power core 1 is an insulated core used for power transmission in the system; the ground core 2 is an insulated core used for grounding in the system; the optical fiber unit 4 is a unit for optical signal transmission in the system; and the monitoring line 5 is an insulated core used for signal control or communication functions in the system.

[0027] Specifically, the cross-section of the cable core is a circular cross-section, and the number of main power line cores 1 is three; the structures of the main power line core 1 and the ground line core 2 are both composed of a first conductor and a first insulating layer wrapping the first conductor; the first conductor is a Class 5 tinned conductor, and the first insulating layer is a cross-linked polyolefin insulating layer.

[0028] The main power line of the shore power system connecting cable consists of a three-core power line, which is mainly used to transmit shore power to the ship for use by the ship and is used for the insulated core of power transmission in the system.

[0029] The conductor adopts Class 5 tinned conductor, which is made of multiple strands of tinned copper wires twisted together and has good bending characteristics. Tinned copper has good electrical conductivity; the surface coating of tinned copper can prevent copper oxidation, improve its anti-corrosion performance, and has good mechanical properties, and can withstand various physical impacts and wear.

[0030] The insulation layer adopts radiation cross-linked polyolefin insulation material. Radiation cross-linked polyolefin insulation is a new type of environmentally friendly material with the characteristics of high temperature resistance, halogen-free, low smoke, flame retardant, etc. It has good heat resistance and radiation resistance and longer service life.

[0031] Specifically, the optical fiber unit 4 is a multimode optical fiber unit 4, which includes 6 multimode optical fibers and a polyurethane (TPU) sheath wrapping the multimode optical fibers; the 6 multimode optical fibers include two multimode optical fibers with a diameter of 62.5 μm and four multimode optical fibers with a diameter of 125 μm.

[0032] The optical fiber unit 4 uses a set of 6×62.5 / 125 graded-index optical fibers, of which two are 62.5 μm multimode optical fibers and four are 125 μm multimode optical fibers.

[0033] The polyurethane (TPU) sheath has low-temperature flexibility, tear resistance, and improved swing and bending performance, and is used for optical signal transmission units in the system.

[0034] As a preferred embodiment of the present invention, see Figure 2 The monitoring line 5 includes an insulating cable core and a second tape 503, a braided shielding layer 504, and a second sheath 505 wrapped around the insulating cable core in sequence; 6 insulating cores are arranged in the insulating cable core, and the insulating core consists of a second conductor 501 and a second insulating layer 502 wrapping the second conductor 501; the second conductor 501 is a Class 6 tinned copper wire composite 1000D bulletproof wire twisted together, and the insulating layer is a PE insulating layer; the second tape 503 is a polyester tape tape, the braided shielding layer 504 is a tinned copper wire shielding layer, and the second sheath 505 is a thermoplastic elastomer sheath.

[0035] The second conductor 501 is a Class 6 tinned conductor, which is formed by twisting multiple strands of tinned copper wires, and 1000D bulletproof wire is added to the twisted conductor to make it have good bending characteristics. Adding bulletproof wire to the conductor can improve its elasticity, flexibility and bending strength, and also improve its swing bending performance, so that it has good bending characteristics.

[0036] The insulation layer uses PE insulation material, mainly to isolate the conductor from the external environment, to prevent the heat generated when the current passes through the conductor and the interference of the current on the surrounding environment. In addition, PE insulation material also has good heat resistance and aging resistance, can withstand long-term high temperature and aging, to ensure the service life of the cable.

[0037] Polyester tape wrapping can effectively isolate and protect the wire core from damage.

[0038] The braided shielding layer 504 is braided with tinned copper wires, and the braiding density is ≥80%, mainly to prevent interference caused by electrostatic interference, electromagnetic induction and crosstalk induction, and ensure the normal operation of system transmission.

[0039] The second sheath 505 is made of thermoplastic elastomer (TPE), which has good impact resistance, low temperature flexibility, low temperature resistance, high temperature resistance, electrical properties, mechanical properties, chemical properties, etc.

[0040] Specifically, the filler 3 is a waterproof filling rope, the first wrapping tape 6 is a non-woven fabric wrapping tape, the waterproof layer 8 is a water-blocking tape, and the inner sheath 7 and the outer sheath 9 are TPU sheaths.

[0041] The waterproof filling rope fills the gaps inside the cable to prevent moisture and other harmful substances from entering the cable, thereby protecting the cable from damage. The waterproof filling rope can improve the flexibility and tensile resistance of the cable and extend the service life of the cable.

[0042] The cable core is wrapped with non-woven fabric when it is cabled to prevent the cable core from loosening or deforming when it is bent, so as to ensure the roundness and tightness of the cable core.

[0043] The inner sheath 7 and the outer sheath 9 are made of TPU sheath material, which has good oil resistance, wear resistance, environmental resistance, weather resistance, corrosion resistance, low temperature flexibility, tear resistance, etc.

[0044] The waterproof layer 8 is wrapped with a water-blocking tape to prevent water molecules from entering the cable through the gaps in the cable to ensure the electrical performance and service life of the cable. The use of the water-blocking tape can prevent the cable from being corroded by water in an underwater or humid environment, thereby improving the water resistance and corrosion resistance of the cable.

[0045] The above is a preferred embodiment of the present invention. It should be pointed out that a person skilled in the art can make several improvements and modifications without departing from the principle of the present invention. These improvements and modifications are also considered to be within the protection scope of the present invention.

Claims

1. A cable for connecting a shore power system, comprising a cable core and a first sheath for wrapping the cable core, characterized in that: The cable core includes four types of wire cores, which are a main power wire core, a ground wire core, an optical fiber unit and a monitoring wire. The cable core is also provided with fillers to fill the gaps between the wire cores. The four wire cores and the fillers are wrapped into a cable by a first wrapping tape, namely the cable core; the first sheath is composed of an inner sheath, a waterproof layer and an outer sheath from the inside to the outside.

2. A shore power system connection cable according to claim 1, characterized in that: The cross section of the cable core is a circular cross section, and the number of the main power line cores is three.

3. A shore power system connection cable according to claim 2, characterized in that: The main power line core and the ground line core are both composed of a first conductor and a first insulating layer wrapping the first conductor; the first conductor is a Class 5 tinned conductor, and the first insulating layer is a cross-linked polyolefin insulating layer.

4. A shore power system connection cable according to claim 1 or 3, characterized in that: The optical fiber unit is a multimode optical fiber unit, and the multimode optical fiber unit comprises 6 multimode optical fibers and a polyurethane sheath wrapping the multimode optical fibers.

5. A shore power system connection cable according to claim 4, characterized in that: The six multimode optical fibers include two multimode optical fibers with a diameter specification of 62.5 μm and four multimode optical fibers with a diameter specification of 125 μm.

6. A shore power system connection cable according to claim 1 or 5, characterized in that: The monitoring line comprises an insulating cable core, and a second wrapping tape, a braided shielding layer, and a second sheath which are sequentially wrapped around the insulating cable core. A plurality of insulating wire cores are arranged in the insulating cable core.

7. A shore power system connection cable according to claim 6, characterized in that: Six insulating cores are arranged in the insulating cable core, and the insulating core consists of a second conductor and a second insulating layer wrapping the second conductor; the second conductor is a Class 6 tinned copper wire composite 1000D bulletproof wire twisted together, and the insulating layer is a PE insulating layer.

8. A shore power system connection cable according to claim 7, characterized in that: The second wrapping tape is a polyester wrapping tape; the braided shielding layer is a tinned copper wire shielding layer, and the braiding density is ≥80%; and the second sheath is a thermoplastic elastomer sheath.

9. A shore power system connection cable according to claim 8, characterized in that: The filler is a waterproof filling rope, the first wrapping tape is a non-woven fabric wrapping tape, the waterproof layer is a water-blocking tape, and the inner sheath and the outer sheath are TPU sheaths.

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