CN214336432U

CN214336432U - Control cable

Info

Publication number: CN214336432U
Application number: CN202120124822.6U
Authority: CN
Inventors: 张清悦; 张海涛; 林群波; 卓晓庆; 张育俊
Original assignee: Guangdong Huanwei Wires And Cables Co ltd
Current assignee: Guangdong Huanwei Wires And Cables Co ltd
Priority date: 2021-01-18
Filing date: 2021-01-18
Publication date: 2021-10-01
Anticipated expiration: 2031-01-18

Abstract

The utility model discloses a control cable, be in including at least two sets of insulation core and packing filling layer around the insulation core, insulation core by the conductor and cover in the elastic insulation layer in the conductor outside is constituteed, the outside of filling layer has set gradually from inside to outside around band, shielding layer and oversheath. The elastic insulating layer is soft and flexible and has good bending performance. The filling layer can guarantee the roundness of cable core, play buffering and liner effect around the band, it is inseparable and have sufficient space to take place deformation around the structure between band and the shielding layer, thereby reduce stress concentration after the shaping, in the control cable use, play thermal-insulated to the insulation core because of the material difference, different effects such as ageing-resistant, the shielding layer can play the effect of shielding outside electromagnetic wave, the outer sheath is high low temperature resistant can the reinforce, this control cable stability is good, heat aging resistance has, tensile strength, mechanical properties such as elongation at break are better.

Description

Control cable

Technical Field

The utility model relates to a by sea photovoltaic power plant control cable research and development field, more specifically say and indicate a control cable.

Background

A control cable for an offshore photovoltaic power station mainly aims to research and develop a novel special cable, belongs to the high and new technical field of national key support, and in recent years, along with increasingly prominent environmental problems, the green development concept gradually deepens into people, the development direction of global economy and navigation marks turn to low-carbon economy, and the solar photovoltaic industry is valued by countries in the world. The twelve and five planning compendium of China proposes that strategic emerging industries such as energy conservation, environmental protection and new energy sources need to be vigorously developed, and the new energy industry mainly develops solar heat utilization, photovoltaic photo-thermal power generation, biomass energy and the like. Among various new energy sources, solar photovoltaic power generation has the advantages of no pollution, sustainability, large total amount, wide distribution, various application forms and the like, and is highly valued by countries in the world. Because all aspects attach importance to the development of the solar photovoltaic industry, a complete solar photovoltaic industry chain is formed in China at present. With the large-scale application and rapid development of domestic solar photovoltaic power generation, solar photovoltaic power stations are well-established in regions with abundant solar energy in some regions at present, and the power generation of the solar photovoltaic power stations is already integrated into national power grids. The photovoltaic is a novel power generation system which directly converts solar radiation energy into electric energy by utilizing the photovoltaic effect of a solar cell semiconductor material, and has two modes of independent operation and grid-connected operation. Photovoltaic power plant accepts solar energy, converts the electric energy into, and the electric current of output at first is low pressure, direct current, then need convert the alternating current into through alternating current-direct current inverter, and rethread step up transformer makes the voltage rise to 220V commonly used, just can the practicality, and the networking. Cables used in photovoltaic systems can be classified into dc and ac cables. The ac cable is a connection cable from the inverter to the step-up transformer and from the step-up transformer to the distribution device, and this part of the cable is not particularly high in demand, and a conventional transmission cable can be used. The direct current cable is used for series cables between photovoltaic cell assemblies or parallel cables between strings and between the strings and a direct current distribution box (a combiner box), and between the direct current distribution box and an inverter. The direct current cable has complex use environment and higher requirement, and the photovoltaic cable is mainly referred to as the cable at present.

Considering that solar energy sufficient areas are mostly in western and coastal areas in China, a plurality of large-scale photovoltaic power stations are also established in the areas. The cable is required to bear lower temperature in western and north areas of China, and the extreme low temperature of individual areas can reach minus 40 ℃ or so, even lower temperature. The earth surface temperature in the east and south regions of China can easily reach more than +70 ℃, the working temperature of a conductor is considered to be higher than the environmental temperature and generate heat volatilization, meanwhile, the temperature of the material of the cable is considered to probably exceed more than +90 ℃ in the areas with unventilated roofs and poor heat dissipation effect of the bridge frame, and the highest temperature is even more than 150 ℃, so that the requirement that the material temperature of the cable can meet the requirement that a power station works at extreme air temperature is required. In special areas such as seaside and mudflat, the cable is required to have strong salt mist and acid-base resistance due to high air humidity and high salt mist content in the areas. Solar photovoltaic power stations are generally erected in deserts, grasslands, coastal areas and urban roofs, and therefore cables for power transmission need to have the characteristics of high and low temperature resistance, ozone resistance, ultraviolet resistance, wear resistance, corrosion resistance, lightning protection, rat bite prevention and the like.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome prior art not enough, provide a control cable.

In order to achieve the above purpose, the utility model adopts the following technical scheme: the utility model provides a control cable, is in including at least two sets of insulation core and packing filling layer around the insulation core, insulation core by the conductor and cover in the elastic insulation layer in the conductor outside constitutes, the outside of filling layer has set gradually from inside to outside around band, shielding layer and oversheath.

The further technical scheme is as follows: the insulated wire cores are seven groups, and the seven groups of insulated wire cores are enclosed to form a structure with a hexagonal cross section.

The further technical scheme is as follows: the alternating current rated voltage of the control cable is 0.6/1kV, and the direct current rated voltage is 1.8 kV.

The further technical scheme is as follows: the conductor is formed by twisting a plurality of metal copper wires.

The further technical scheme is as follows: the number of the metal copper wires is not less than 7.

The further technical scheme is as follows: the insulated wire cores are three groups, four groups, five groups or six groups.

The further technical scheme is as follows: the control cable can withstand a high temperature of 140 ℃.

The further technical scheme is as follows: the filling layer is a filling rope.

Compared with the prior art, the utility model beneficial effect be: the utility model relates to a flexible of control cable's elastic insulation layer, good bending property has, the filling layer can guarantee the rounding of cable core, play buffering and liner effect around the band, compact structure and enough space take place deformation around between band and the shielding layer, thereby reduce the stress concentration after the shaping, in control cable use, because of different effects such as material is thermal-insulated, or anticorrosive, ageing-proof to the insulation core, the shielding layer can play the effect of shielding outside electromagnetic wave, it is more stable to signal transmission to protect inside signal line, do not disturb, the oversheath is able to bear the high low temperature strong, the control cable stability is good, it is better to have mechanical properties such as thermal-aging resistance, tensile strength, elongation at break, can be in the sharp change range of-50 ℃ -125 ℃ stable operation, can satisfy the needs of solar power station control signal transmission, the solar energy collector has the advantages of low temperature resistance, ozone resistance, weather resistance, direct current voltage resistance, dynamic penetration resistance and the like, can prevent rain, snow, hail, sand wind, high temperature, low temperature, smog, bird pecking, animal biting, chemical substances, has strong short-time overload capacity, large current-carrying capacity, wind power swing and other mechanical external forces, and has long service life.

The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical means of the present invention more clearly understood, the present invention may be implemented according to the content of the description, and in order to make the above description and other objects, features, and advantages of the present invention more clearly understandable, preferred embodiments are specifically mentioned, and detailed description is given below.

Drawings

Fig. 1 is a schematic structural diagram of a control cable.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention will be described in further detail with reference to the accompanying drawings and the following detailed description.

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by those skilled in the art without creative efforts belong to the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and to simplify the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "secured" are to be construed broadly and can, for example, be connected or detachably connected or integrated; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above should not be understood to necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples described in this specification can be combined and combined by one skilled in the art.

As shown in fig. 1, the control cable comprises at least two groups of insulated wire cores and a filling layer 3 filled around the insulated wire cores, wherein each insulated wire core is composed of a conductor 1 and an elastic insulating layer 2 covering the outer side of the conductor 1, and a wrapping tape 4, a shielding layer 5 and an outer sheath 6 are sequentially arranged on the outer side of the filling layer 3 from inside to outside. The elastic insulating layer 2 is soft and flexible and has good bending performance. The filling layer 3 can ensure the roundness of the cable core, the wrapping tape 4 plays a role of buffering and lining, the structure between the wrapping tape 4 and the shielding layer 5 is compact and has enough space for deformation, thereby reducing stress concentration after forming, in the using process of the control cable, the insulating wire core plays different roles of heat insulation, corrosion resistance, aging resistance and the like due to different materials, the shielding layer 5 can play a role of shielding external electromagnetic waves, the internal signal line is protected from more stable signal transmission and interference, the outer sheath 6 has strong high and low temperature resistance, the control cable has good stability, heat resistance, aging resistance, tensile strength, elongation at break and other mechanical properties, can stably operate in a sharp temperature change range of-50 ℃ to 125 ℃, can meet the requirement of control signal transmission of a solar power station, and has the functions of low temperature resistance, ozone resistance, weather resistance, direct current voltage resistance, The composite material has the advantages of dynamic penetration resistance and the like, can resist rain, snow, hail, sand, high temperature, low temperature, smog, bird pecking, animal biting, chemical substances, strong short-time overload capacity, large current-carrying capacity, wind power swing and other mechanical external forces, and has long service life.

In one embodiment, the seven groups of insulated wire cores can improve the transmission efficiency, and the seven groups of insulated wire cores surround to form a structure with a cross section of a regular hexagon body so as to form a compact layout mode, so that the combination layout between the seven groups of insulated wire cores is difficult to change by external force, and the space utilization rate is high.

In one embodiment, the insulation material comprises 45-55 kg of ethylene propylene diene monomer, 45-55 kg of polypropylene, 2-3 kg of vulcanizing agent, m-phenylene bismaleimide, 0.05-1 kg of antioxidant, 0.05-0.1 kg of anti-ultraviolet agent, 0.5-1 kg of lubricant and 0.5-1 kg of carbon black. The prepared elastic material is soft, has good bending performance and is resistant to high and low temperatures.

In one embodiment, the outer sheath material is composed of 45-55 kg of ethylene propylene diene monomer, 45-55 kg of polypropylene, 2-3 kg of vulcanizing agent, m-phenylene bismaleimide, 0.1-2 kg of antioxidant, 0.05-0.3 kg of anti-ultraviolet agent, 0.5-1 kg of lubricant and 0.8-1.4 kg of carbon black. The prepared outer sheath material has good stability and good mechanical properties such as heat aging resistance, tensile strength, elongation at break and the like.

In one embodiment, the antioxidant is a mixture of 2, 5-di-tert-butylhydroquinone and phosphite ester, and the anti-ultraviolet agent is a mixture of a light stabilizer and an ultraviolet absorber. Antioxidants retard or inhibit the progress of the polymer oxidation process, thereby preventing aging and extending the useful life of the polymer.

In one embodiment, the AC rated voltage of the control cable is 0.6/1kV, and the DC rated voltage is 1.8kV, so that the control cable is suitable for photovoltaic power stations on the verge of the sea.

In one embodiment, the conductor 1 is formed by twisting a plurality of metallic copper wires. A plurality of metal copper wires are twisted to ensure the flexibility and the tensile capacity of the conductor 1.

In one embodiment, the number of the metallic copper wires is not less than 7, so that the flexibility and the tensile strength of the conductor 1 can be ensured.

In one embodiment, the control cable can withstand a high temperature of 140 ℃. The high temperature resistant solar power station has high temperature resistance, can stably operate in a sharp temperature change range of-50 ℃ to 125 ℃, and can meet the requirement of control signal transmission of the solar power station.

In one embodiment, the filling layer 3 is a filling rope to ensure the roundness of the insulated wire core.

In another embodiment, the insulated wire cores are in three, four, five or six groups. The specific group number is set according to actual application occasions to meet different power consumption requirements.

Compared with the prior art, the utility model relates to a flexible of elastic insulation layer of control cable, have good bending property, the filling layer can guarantee the rounding of cable core, play buffering and liner effect around the band, compact structure and enough space take place deformation around between band and the shielding layer, thereby reduce the stress concentration after the shaping, in the use of control cable, because of different effects such as material difference plays thermal-insulated, or anticorrosive, anti-aging to the insulation core, the shielding layer can play the effect of shielding outside electromagnetic wave, it is more stable to protect internal signal line to signal transmission, do not disturb, the oversheath is able to bear the high low temperature strong, the stability of this control cable is good, it has thermal ageing resistance, tensile strength, mechanical properties such as elongation at break can be better, can be in the sharp change range of-50 ℃ to 125 ℃, can satisfy the needs of solar power station control signal transmission, the solar energy collector has the advantages of low temperature resistance, ozone resistance, weather resistance, direct current voltage resistance, dynamic penetration resistance and the like, can prevent rain, snow, hail, sand wind, high temperature, low temperature, smog, bird pecking, animal biting, chemical substances, has strong short-time overload capacity, large current-carrying capacity, wind power swing and other mechanical external forces, and has long service life.

The technical content of the present invention is further described by the embodiments only, so that the reader can understand it more easily, but the embodiments of the present invention are not limited thereto, and any technical extension or re-creation according to the present invention is protected by the present invention. The protection scope of the present invention is subject to the claims.

Claims

1. The utility model provides a control cable, its characterized in that is in including at least two sets of insulation core and packing filling layer around the insulation core, insulation core by the conductor and cover in the elastic insulation layer in the conductor outside constitutes, the outside of filling layer has set gradually around band, shielding layer and oversheath from inside to outside, insulation core is seven groups, seven groups insulation core encloses to close the structure that forms the cross-section for the regular hexagon body, control cable's alternating current rated voltage is 0.6/1kV, and direct current rated voltage is 1.8 kV.

2. The control cable of claim 1, wherein said conductor is stranded from a plurality of metallic copper wires.

3. The control cable of claim 2, wherein said metallic copper wires are not less than 7.

4. The control cable of claim 1, wherein the insulated wire cores are in three, four, five or six groups.

5. The control cable of claim 1, wherein the control cable is capable of withstanding high temperatures of 140 ℃.

6. The control cable of claim 1, wherein the filler layer is a filler rope.