CN216119622U

CN216119622U - Mechanical load resistant photovoltaic direct current cable

Info

Publication number: CN216119622U
Application number: CN202122430808.1U
Authority: CN
Inventors: 刘欣; 季美宏
Original assignee: Suzhou Tongyuan Cable Technology Co ltd
Current assignee: Suzhou Tongyuan Cable Technology Co ltd
Priority date: 2021-10-09
Filing date: 2021-10-09
Publication date: 2022-03-22
Anticipated expiration: 2031-10-09

Abstract

The utility model relates to the technical field of cables, in particular to a mechanical load resistant photovoltaic direct current cable which comprises an oxygen-free tin-plated soft copper wire, wherein an irradiation cross-linked polyolefin insulating sleeve is extruded outside the oxygen-free tin-plated soft copper wire, an irradiation cross-linked polyolefin inner sheath is extruded outside the irradiation cross-linked polyolefin insulating sleeve, a hollowed-out cavity is formed in the irradiation cross-linked polyolefin inner sheath, the hollowed-out cavity is provided with two layers, each layer of hollowed-out cavity is annularly arranged at intervals around the center of the irradiation cross-linked polyolefin inner sheath, the two layers of hollowed-out cavities are arranged in a staggered mode, and an irradiation cross-linked polyolefin outer sheath is extruded outside the irradiation cross-linked polyolefin inner sheath. According to the utility model, the irradiation cross-linked polyolefin inner sheath has a deformation space in the 360-degree direction through the hollow cavities which are annularly arranged at intervals at the circle center and are staggered with each other, and the irradiation cross-linked polyolefin inner sheath is resistant to bending and impact and has good mechanical load resistance.

Description

Mechanical load resistant photovoltaic direct current cable

Technical Field

The utility model relates to the technical field of cables, in particular to a mechanical load resistant photovoltaic direct current cable.

Background

The photovoltaic direct current cable is a cable used for a low-voltage direct current transmission part in a solar photovoltaic power generation system, and because the use environment and the technical requirements are different, different requirements are connected to different parts, and the overall factors to be considered are as follows: the cable has the advantages of insulation performance, heat resistance, flame retardance, aging resistance, wire diameter specification and the like.

During installation and maintenance of photovoltaic dc cables, the cables need to be routed on sharp edges of the roof structure, while the cables are also subjected to pressure, bending, tension, cross tensile loads and strong impacts. If the cable sheath is not strong enough, the cable insulation layer will be damaged seriously, thereby affecting the service life of the whole cable, or causing the problems of short circuit, fire hazard, personnel injury danger and the like.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a mechanical load resistant photovoltaic direct current cable to solve the problems in the background technology.

In order to achieve the purpose, the utility model provides the following technical scheme: the utility model provides an anti mechanical load type photovoltaic direct current cable, includes oxygen-free tin-plated soft copper wire, oxygen-free tin-plated soft copper wire extrudees outward and wraps has irradiation crosslinked polyolefin insulating boot, irradiation crosslinked polyolefin insulating boot extrudes outward and wraps has irradiation crosslinked polyolefin inner sheath, the fretwork cavity has been seted up to irradiation crosslinked polyolefin inner sheath, the fretwork cavity is equipped with two-layerly, and every layer of fretwork cavity is annular interval arrangement with the centre of a circle of irradiation crosslinked polyolefin inner sheath, and two-layer fretwork cavity staggered arrangement each other, the U-shaped groove has been seted up to the surface of irradiation crosslinked polyolefin inner sheath, be equipped with the filler strip in the U-shaped groove, irradiation crosslinked polyolefin inner sheath extrudes outward and wraps has irradiation crosslinked polyolefin oversheath, irradiation crosslinked polyolefin extrudes outward and wraps has resistant sheath, resistant sheath is extruded outward and is wrapped has wear-resisting sheath.

Optionally, the longitudinal section of the hollow cavity is in a shape of a cashew nut.

Optionally, the longitudinal section of the filler strip is circular.

Optionally, the wear-resisting sheath integrated into one piece has the bead, the bead is equipped with eight, eight the bead is the annular interval along the surface of wear-resisting sheath and arranges, the longitudinal section of bead is isosceles trapezoid.

Compared with the prior art, the utility model has the following beneficial effects:

1. according to the radiation cross-linked polyolefin inner sheath, the hollow cavities which are annularly arranged at intervals at the circle center and are arranged in a staggered manner are formed, so that the radiation cross-linked polyolefin inner sheath has a deformation space in the direction of 360 degrees, is resistant to bending and impact and has good mechanical load resistance;

2. according to the utility model, the filling strips are embedded in the outer surface of the irradiation crosslinking polyolefin inner sheath, so that the irradiation crosslinking polyolefin inner sheath has a cage-shaped protection structure, the tensile capacity of the irradiation crosslinking polyolefin inner sheath is greatly improved, the rib improves the torsion-resistant rigidity of the wear-resistant sheath, and the photovoltaic direct-current cable is round and complete as a whole.

Drawings

Fig. 1 is a schematic structural view of the whole of the present invention.

In the figure: 1. carrying out oxygen-free tinning on the soft copper wire; 2. irradiating the cross-linked polyolefin insulating sleeve; 3. irradiating the cross-linked polyolefin inner sheath; 4. hollowing out the cavity; 5. a U-shaped groove; 6. filling the strip; 7. irradiating the outer sheath of cross-linked polyolefin; 8. a weather-resistant sheath; 9. a wear-resistant sheath; 10. and (7) a rib.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example (b): referring to fig. 1, the utility model provides a mechanical load resistant photovoltaic direct current cable, which comprises an oxygen-free tin-plated soft copper wire 1, wherein an irradiation cross-linked polyolefin insulating sleeve 2 is extruded outside the oxygen-free tin-plated soft copper wire 1, an irradiation cross-linked polyolefin inner sheath 3 is extruded outside the irradiation cross-linked polyolefin insulating sleeve 2, a hollowed cavity 4 is formed in the irradiation cross-linked polyolefin inner sheath 3, the longitudinal section of the hollowed cavity 4 is in a cashew nut shape, two layers of hollowed cavities 4 are arranged, each layer of hollowed cavity 4 is annularly arranged at intervals around the center of the irradiation cross-linked polyolefin inner sheath 3, the two layers of hollowed cavities 4 are arranged in a staggered mode, a U-shaped groove 5 is formed in the outer surface of the irradiation cross-linked polyolefin inner sheath 3, a filling bar 6 is arranged in the U-shaped groove 5, and the longitudinal section of the filling bar 6 is circular. An irradiation cross-linked polyolefin outer sheath 7 is extruded outside the irradiation cross-linked polyolefin inner sheath 3, a weather-resistant sheath 8 is extruded outside the irradiation cross-linked polyolefin outer sheath 7, and a wear-resistant sheath 9 is extruded outside the weather-resistant sheath 8. Wear-resisting sheath 9 integrated into one piece has bead 10, and bead 10 is equipped with eight, and eight bead 10 are annular interval arrangement along the surface of wear-resisting sheath 9, and the longitudinal section of bead 10 is isosceles trapezoid, and bead 10 has improved wear-resisting sheath 9's resistant rigidity of turning round.

The centre of a circle of fretwork cavity 4 is annular interval arrangement and staggered arrangement each other for irradiation cross-linked polyolefin inner sheath 3 has the deformation space in 360 degrees directions, and irradiation cross-linked polyolefin inner sheath 3 is resistant buckling, shock-resistant, has fine anti mechanical load ability, and filler strip 6 is embedded in the surface of irradiation cross-linked polyolefin inner sheath 3, makes irradiation cross-linked polyolefin inner sheath 3 have tube cage form protective structure, has improved irradiation cross-linked polyolefin inner sheath 3's tensile ability greatly.

In the embodiment, the oxygen-free tin-plated copper conductor has excellent conductive effect; the irradiation cross-linked polyolefin insulating sleeve 2, the irradiation cross-linked polyolefin inner sheath 3 and the irradiation cross-linked polyolefin outer sheath 7 have reliable insulativity and mechanical property; the filling strips 6 are made of nylon wires and have reliable tensile property; the weather-resistant sheath 8 is made of polytetrafluoroethylene, has the advantages of high and low temperature resistance, corrosion resistance, weather resistance, high insulation and the like, and effectively protects the inner layer structure; the wear-resistant sheath 9 serves as an outermost layer structure and protects the photovoltaic direct-current cable from being worn in the installation process.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides an anti mechanical load type photovoltaic direct current cable which characterized in that: the novel radiation-resistant soft copper wire comprises an oxygen-free tin-plated soft copper wire (1), wherein an irradiation cross-linked polyolefin insulating sleeve (2) is extruded outside the oxygen-free tin-plated soft copper wire (1), an irradiation cross-linked polyolefin inner sheath (3) is extruded outside the irradiation cross-linked polyolefin insulating sleeve (2), hollow cavities (4) are formed in the irradiation cross-linked polyolefin inner sheath (3), the hollow cavities (4) are arranged in two layers, each layer of hollow cavity (4) is arranged in an annular interval mode with the circle center of the irradiation cross-linked polyolefin inner sheath (3), the two layers of hollow cavities (4) are arranged in a staggered mode, a U-shaped groove (5) is formed in the outer surface of the irradiation cross-linked polyolefin inner sheath (3), a filling strip (6) is arranged in the U-shaped groove (5), an irradiation cross-linked polyolefin outer sheath (7) is extruded outside the irradiation cross-linked polyolefin inner sheath (7), and a weather-resistant sheath (8) is extruded outside the irradiation cross-linked polyolefin outer sheath (7), the weather-resistant sheath (8) is externally extruded with a wear-resistant sheath (9).

2. The mechanical load resistant photovoltaic dc cable according to claim 1, wherein: the longitudinal section of the hollow cavity (4) is in a cashew shape.

3. The mechanical load resistant photovoltaic dc cable according to claim 1, wherein: the longitudinal section of the filling strip (6) is circular.

4. The mechanical load resistant photovoltaic dc cable according to claim 1, wherein: wear-resisting sheath (9) integrated into one piece has bead (10), bead (10) are equipped with eight, eight bead (10) are the annular interval arrangement along the surface of wear-resisting sheath (9), the longitudinal section of bead (10) is isosceles trapezoid.