Ultralow-temperature ultraviolet-resistant solar photovoltaic cable

Abstract

The utility model discloses an ultralow-temperature ultraviolet-resistant solar photovoltaic cable, which comprises a cable main body, the cable main body comprises an alloy conductor and a cable core assembly formed by a plurality of surrounding conductors, and the cable core assembly is arranged in a filling layer. An XLPE inner layer, a connecting layer, a flame-retardant layer, a shielding layer, an elastic layer, an XLPE outer layer and a protective layer are sequentially arranged outside the filling layer, and a connecting mechanism composed of two hoops is arranged outside the cable body. The cable is scientific and reasonable in structural design, the XLPE inner layer and the XLPE outer layer are added on the basis of the inner protective layer of the cable main body to be matched for use, the accelerator is adopted to irradiate and crosslink the XLPE, the molecular structure of the inner layer material is changed, the low temperature resistant grade reaches-60 DEG C, the high temperature meets + 150 DEG C, the inner layer and the outer layer are tightly combined, the insulating property of the cable main body is improved, and the service life of the cable main body is prolonged. And a connecting mechanism composed of two groups of hoops is arranged outside the cable, and the cable main body can be conveniently installed and fixed under the cooperation of the lug seat and the hook.

Description

Technical Field

[0001] The utility model relates to the technical field of cable equipment, in particular to an ultra-low temperature and ultraviolet resistant solar photovoltaic cable. Background Art

[0002] Solar photovoltaic cables are often used in harsh environmental conditions (-40+90℃), such as high temperature 90℃, low temperature -40℃, ultraviolet radiation, acid and alkali resistance and other complex environments. The use environment of conventional solar photovoltaic cables can basically meet the installation and use of 60% of the regions. In Northeast my country, Northern Europe, North America and other places, photovoltaic resources are relatively advantageous, but the weather is bad and the ambient temperature can be reduced to about -55 degrees. As far as the application of photovoltaic system cables is concerned, the materials used outdoors should be determined according to ultraviolet rays, ozone, drastic temperature differences and chemical erosion. The mandatory use and installation of conventional photovoltaic lines will not only cause the outer skin of the photovoltaic cable to crack, decompose and age, and change color, but also damage and reduce the electrical and mechanical properties. All these situations will directly increase the complexity and instability of the cable installation system, and may even cause safety hazards. To this end, we propose an ultra-low temperature and ultraviolet resistant solar photovoltaic cable. Utility Model Content

[0003] The utility model aims to provide an ultra-low temperature and ultraviolet resistant solar photovoltaic cable to solve the problems raised in the above background technology.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an ultra-low temperature and ultraviolet-resistant solar photovoltaic cable, comprising a cable body, the cable body comprising a cable core assembly consisting of an alloy conductor and a plurality of surrounding conductors, the cable core assembly being arranged in a filling layer, the outside of the filling layer being sequentially provided with an XLPE inner layer, a connecting layer, a flame retardant layer, a shielding layer, an elastic layer, an XLPE outer layer and a protective layer, and the outside of the cable body being provided with a connecting mechanism consisting of two clamps.

[0005] In the above solution, a plurality of surrounding conductors surround the outside of the alloy conductor at equal distances.

[0006] In the above solution, the filling layer is a PFA or foamed TPE layer.

[0007] In the above scheme, the connecting blocks at the ends of the clamp are assembled by bolts, and a hook is hinged on the ear seat at the top of the clamp.

[0008] In the above solution, the flame retardant layer is a mica layer.

[0009] In the above solution, the shielding layer is a metal shielding layer.

[0010] In the above solution, the protective layer is a polytetrafluoroethylene layer.

[0011] Compared with the prior art, the beneficial effects of the utility model are as follows: the ultra-low temperature and UV-resistant solar photovoltaic cable has a simple and reasonable structural design and strong practicality. An XLPE inner layer is added to the inner protective layer of the cable body and used in conjunction with an XLPE outer layer. The XLPE is cross-linked by accelerator irradiation, and the molecular structure of the inner layer material changes. The low temperature resistance level reaches -60°C and the high temperature meets +150°C. The inner layer and the outer layer are tightly combined, thereby improving the insulation performance of the cable body. A connecting mechanism composed of two groups of clamps is arranged on the outside of the cable. At the same time, the cable body can be conveniently installed and fixed with the cooperation of the ear seat and the hook. Under the action of the connecting mechanism, the cable body has more force support points, thereby improving the support and restraint effect on the cable body and enhancing the disaster resistance of the cable in extreme weather. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the structure of the utility model.

[0013] Figure 2 It is a structural schematic diagram of the connection mechanism of the utility model.

[0014] In the figure: 1, cable body 10, cable core assembly 101, alloy conductor 102, surrounding conductor 11, filling layer 12, XLPE inner layer 13, connecting layer 14, flame retardant layer 15, shielding layer 16, elastic layer 17, XLPE outer layer 18, protective layer 19, clamp 2, connecting block 21, ear seat 22, hook. DETAILED DESCRIPTION

[0015] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0016] See also Figure 1-2 The utility model provides a technical solution: an ultra-low temperature and ultraviolet resistant solar photovoltaic cable, comprising a cable body 1, wherein the cable body 1 comprises a cable core assembly 10 composed of an alloy conductor 101 and a plurality of surrounding conductors 102, wherein the cable core assembly 10 is arranged in a filling layer 11, and an XLPE inner layer 12, a connecting layer 13, a flame retardant layer 14, a shielding layer 15, an elastic layer 16, an XLPE outer layer 17 and a protective layer 18 are sequentially arranged on the outside of the cable body 1, and a connecting mechanism composed of two clamps 19 is arranged on the outside of the cable body 1.

[0017] Specifically, the inner layer adopts accelerator irradiation cross-linked XLPE, the molecular structure of the inner layer material changes, the low temperature resistance level reaches -60℃, the high temperature meets +150℃, and there is no cracking in the low temperature -65℃ test (low temperature stretching, low temperature winding, low temperature impact), the insulation resistance reaches ≥7000MΩ.KM, and the insulation resistance change rate in a humid environment is basically not affected by temperature differences, and the dielectric strength is high.

[0018] The outer layer uses a special modified material XLPE, a double-layer composite insulation structure, and the inner and outer layers are tightly combined. After double-layer accelerator irradiation, the overall outdoor UV resistance does not change color and does not crack evenly. In the xenon lamp aging test, the harsh experimental environment is simulated, with 50W UV irradiance, 60% humidity, 20min / 50℃ hot water spray, xenon lamp drying for 120min as the basis, and continuous cycle of 360 frequencies, all passed the test. The ultra-low temperature UV-resistant solar photovoltaic cable made in the above way can solve the use, installation, and laying of photovoltaic systems in special extremely cold areas. At the same time, the material can also be used in other cable products, greatly improving the safety of the entire photovoltaic system.

[0019] In the above solution, a plurality of surrounding conductors 102 surround the outside of the alloy conductor 101 at equal distances.

[0020] In the above scheme, the filling layer 11 is a PFA or foamed TPE layer. PFA filling materials are inert in most chemical environments. This design greatly increases the overall safety during use. PFA filling materials have excellent high and low temperature resistance. The surrounding wire 11 is arranged around the outside of the alloy conductor 101, so that each wire is independently separated, which effectively improves the structural strength of the cable body, thereby ensuring that the conductors will not be entangled with each other, and can achieve good anti-torsion and anti-bending effects, thereby improving the use effect of the cable.

[0021] In the above scheme, the connecting block 2 at the end of the clamp 19 is assembled by bolts, and a hook 22 is hinged on the ear seat 21 at the top of the clamp 19. After the cable is installed, it can be supported and fixed at a fixed point, so that the installed cable is firm and safe. The ear seat 21 and the hook 22 can cooperate with each other, so that the device can be easily suspended and dragged during use, further improving the installation and use effect of the cable.

[0022] By arranging a connecting mechanism consisting of two groups of clamps 19 on the outside of the cable, the cable body can be easily installed and fixed with the cooperation of the ear seat 21 and the hook 22. Under the action of the connecting mechanism, the cable body has more force support points, thereby improving the supporting and restraining effect on the cable body and enhancing the disaster resistance of the cable in extreme weather.

[0023] In the above solution, the flame retardant layer 14 is a mica layer. Synthetic mica has a high fire resistance temperature, so as to achieve the effect of keeping the cable line intact as much as possible under the combustion condition.

[0024] In the above scheme, the shielding layer 15 is a metal shielding layer. The design of the shielding layer 15 can shield the current magnetic field inside the cable from interfering with the external signal and the information transmitted by the control wire and cable. The shielding layer of the existing cable mostly adopts metal braid, which is relatively mature in technology and can meet the requirements of various types of cables for anti-interference performance.

[0025] In the above scheme, the protective layer 18 is a polytetrafluoroethylene layer. Its wear resistance is guaranteed and its service life is further extended. It can provide sufficient protection for the inner layer structure. Polytetrafluoroethylene has electrical insulation and good anti-aging resistance, can be used for a long time, and is resistant to high and low temperatures. It can still maintain good toughness at low temperatures. The outer skin of the photovoltaic cable is not easy to crack, decompose and age, change color, etc., and the electrical and mechanical properties are enhanced.

[0026] Working principle:

[0027] The ultra-low temperature and ultraviolet resistant solar photovoltaic cable comprises a cable core assembly consisting of an alloy conductor 101 and a surrounding conductor 102, and an XLPE inner layer 12, a connecting layer 13, a flame retardant layer 14, a shielding layer 15, an elastic layer 16, an XLPE outer layer 17 and a protective layer 18 are arranged on the outside.

[0028] By adding an XLPE inner layer and an XLPE outer layer on the basis of the inner protective layer of the cable body, and using an accelerator to irradiate and cross-link the XLPE, the molecular structure of the inner layer material changes, the low temperature resistance level reaches -60°C, and the high temperature meets +150°C. The inner and outer layers are tightly combined, thereby improving the insulation performance of the cable body. By arranging a connecting mechanism composed of two groups of clamps 19 on the outside of the cable, the cable body 1 can be easily installed and fixed with the cooperation of the ear seat 21 and the hook 22. Under the action of the connecting mechanism, the cable body 1 has more force support points, thereby improving the support and restraint effect on the cable body and enhancing the disaster resistance of the cable in extreme weather.

[0029] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An ultra-low temperature and ultraviolet resistant solar photovoltaic cable, comprising a cable body (1), Features: The cable body (1) comprises a cable core assembly (10) composed of an alloy conductor (101) and a plurality of surrounding conductors (102); the cable core assembly (10) is arranged in a filling layer (11); an XLPE inner layer (12), a connecting layer (13), a flame retardant layer (14), a shielding layer (15), an elastic layer (16), an XLPE outer layer (17) and a protective layer (18) are arranged in sequence on the outside of the filling layer (11); and a connection mechanism composed of two clamps (19) is arranged on the outside of the cable body (1).

2. The ultra-low temperature UV-resistant solar photovoltaic cable according to claim 1, Features: A plurality of surrounding conductors (102) surround the alloy conductor (101) at equal distances.

3. The ultra-low temperature and ultraviolet resistant solar photovoltaic cable according to claim 1, Features: The filling layer (11) is a PFA or foamed TPE layer.

4. The ultra-low temperature and ultraviolet resistant solar photovoltaic cable according to claim 1, Features: The connecting block (2) at the end of the clamp (19) is assembled by bolts, and a hook (22) is hinged on the ear seat (21) at the top of the clamp (19).

5. The ultra-low temperature UV-resistant solar photovoltaic cable according to claim 1, Features: The flame retardant layer (14) is a mica layer.

6. The ultra-low temperature UV-resistant solar photovoltaic cable according to claim 1, Features: The shielding layer (15) is a metal shielding layer.

7. The ultra-low temperature UV-resistant solar photovoltaic cable according to claim 1, Features: The protective layer (18) is a polytetrafluoroethylene layer.

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