Special cable for AC-DC conversion

Abstract

The invention relates to the technology of cable equipment, in particular to a special cable for alternating current and direct current conversion, which comprises a wire core group, a cable core and a cable core, the three side edges of the triangular isolation belt are concave inwards to form arc-shaped grooves, and the three wire core pieces are attached to the three arc-shaped grooves respectively; the shielding layer is arranged on the wire core piece in a sleeving manner; the cable core pieces, the triangular isolation belt and the shielding layer are all arranged in the cabling bundling layer, and one sides of the three cable core pieces are all connected with the inner wall of the cabling bundling layer in an attached mode; the reinforcing sleeve layer is arranged on the cabling binding layer in a sleeving manner; the problems that a direct-current wire core and an alternating-current wire core are usually arranged in the special cable for alternating-current and direct-current conversion, the whole cable needs to be replaced when a certain wire core breaks down, and when the special cable for alternating-current and direct-current conversion is used in a matched mode, equipment shutdown is caused by replacement of the cable, and the working efficiency of the equipment is affected are solved.

Description

Technical Field

[0001] The invention relates to cable equipment technology, in particular to a special cable for AC / DC conversion. Background Art

[0002] Special cables for AC / DC conversion are mostly used in the photovoltaic industry. DC photovoltaic cables are mainly used to connect the cables between photovoltaic modules and inverters, and are responsible for transmitting the DC power generated by solar panels. AC photovoltaic cables are mainly used to connect the cables between inverters and power grids or loads, and are responsible for transmitting the AC power converted by the inverter.

[0003] The dedicated cable for AC / DC conversion usually has a DC core and an AC core inside. When one of the cores fails, the entire cable needs to be replaced. When used in conjunction with the cable, the equipment will be shut down due to cable replacement, affecting the equipment's working efficiency. Summary of the invention

[0004] The purpose of the present invention is to provide a special cable for AC / DC conversion, which solves the problem that the special cable for AC / DC conversion is usually provided with a DC core and an AC core inside, and when a core fails, the entire cable needs to be replaced. When the cable is used in conjunction, the equipment will be shut down due to the replacement of the cable, affecting the working efficiency of the equipment.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solutions: A special cable for AC / DC conversion, comprising: A wire core group, the wire core group comprising three wire core pieces; A triangular isolation belt, wherein the three sides of the triangular isolation belt are all concave to form arc-shaped grooves, and the three wire core pieces are respectively fitted into the three arc-shaped grooves; A shielding layer, sleeved on the wire core member; A cabling bundling layer, wherein the wire core pieces, the triangular isolation belt and the shielding layer are all arranged in the cabling bundling layer, and one side of the three wire core pieces is bonded and connected to the inner wall of the cabling bundling layer; A reinforcing sleeve layer, sleeved on the cabling bundling layer; and The thickened wear-resistant pipe is sleeved on the reinforcement sleeve layer.

[0006] A further technical solution is that three filling strips are further provided in the cabling bundling layer, and the three filling strips are respectively arranged in the gap formed between two adjacent wire core members and the inner wall of the cabling bundling layer, and two spaced reinforcing ribs are provided on the inner side of the filling strip along its length direction.

[0007] A further technical solution is that the shielding layer includes an insulating heat-conducting layer, an insulating shielding layer, a water-blocking layer, an alloy nesting layer and a plastic reinforced protective layer which are bonded and connected from the inside to the outside.

[0008] A further technical solution is that the reinforcement sleeve includes an inner lining layer, a first steel wire armor layer, a first anti-wear layer, a second steel wire armor layer and a second anti-wear layer arranged in sequence from the inside to the outside, and the first steel wire armor layer and the second steel wire armor layer both include a plurality of steel wires distributed in a circular array, and the steel wires are inclined, and the inclination angle is 5-10°.

[0009] A further technical solution is that the three core parts are respectively a DC core, an AC core and a spare core.

[0010] A further technical solution is that the thickened wear-resistant pipe includes a first PE sheath layer, a stretching layer and a second PE sheath layer arranged in sequence from the inside to the outside, and the stretching layer includes a plurality of stretching strips, and the plurality of stretching strips are in a corrugated structure and distributed in a circular array on the outside of the first PE sheath layer.

[0011] Compared with the prior art, the present invention has the following beneficial effects: By setting up three core components, it is convenient to flexibly allocate the core components. When one core component fails, another core component can be used for transmission operation without affecting the progress of the transmission operation. When the transmission operation is completed, the cable can be replaced without affecting the normal operation of the equipment for the transmission operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the structure of the special cable for AC / DC conversion of the present invention.

[0013] Figure 2 It is a structural schematic diagram of the triangular isolation zone in the present invention.

[0014] Figure 3 It is a schematic structural diagram of the thickened wear-resistant pipe of the present invention. DETAILED DESCRIPTION

[0015] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0016] Example: Figure 1-3 A preferred embodiment of the AC-DC conversion dedicated cable of the present invention is shown. The AC-DC conversion dedicated cable in this embodiment specifically includes A wire core group, the wire core group comprising three wire core pieces 1; A triangular isolation belt 2, wherein the three sides of the triangular isolation belt 2 are all concave to form arc-shaped grooves, and the three wire core pieces 1 are respectively fitted into the three arc-shaped grooves; A shielding layer, sleeved on the wire core member 1; A cabling bundling layer 3, wherein the wire core pieces 1, the triangular isolation belt 2 and the shielding layer are all arranged in the cabling bundling layer 3, and one side of the three wire core pieces 1 is bonded and connected to the inner wall of the cabling bundling layer 3; A reinforcing sleeve layer, sleeved on the cabling bundling layer 3; and The thickened wear-resistant pipe is sleeved on the reinforcement sleeve layer.

[0017] In the present invention, by setting three core components 1, it is convenient to flexibly allocate the core components 1. When a core component 1 fails, another core component 1 can be used for transmission operation without affecting the progress of the power transmission operation. When the power transmission operation is completed, the cable can be replaced without affecting the normal operation of the equipment for the power transmission operation.

[0018] Three filling strips 4 are also provided in the cabling bundling layer 3. The three filling strips 4 are respectively arranged in the gap formed between two adjacent core pieces 1 and the inner wall of the cabling bundling layer 3. Two spaced reinforcing ribs 5 are provided on the inner side of the filling strip 4 along its length direction. The filling strip 4 is made of heat-conducting material to absorb the heat dissipated from the core piece 1. When the cable is in use, the energized single core piece 1 will generate heat during transmission. The heat of the heated core piece 1 is absorbed by the filling strip 4, which facilitates the heat dissipation of the heated core piece 1, thereby not affecting the normal operation of power transmission.

[0019] At the same time, two spaced reinforcing ribs 5 are provided in the filling strip 4 to improve the structural stability of the filling strip 4. At the same time, three filling strips 4 are evenly distributed in the cable bundling layer 3, and the three core pieces 1 are isolated by the triangular isolation belt 2 to prevent a single core piece 1 from being disturbed by the core pieces 1 next to it during operation.

[0020] The shielding layer includes an insulating thermal conductive layer 6, an insulating shielding layer 7, a water-blocking layer 8, an alloy nested layer 9 and a plastic reinforced protective layer 10 which are bonded together from the inside to the outside. The insulating thermal conductive layer 6 has the functions of thermal conduction and insulation. The insulating shielding layer 7 mainly serves to isolate the inside and the outside to prevent external electromagnetic equipment from interfering with the normal operation of the cable. The water-blocking layer 8 is used to isolate external moisture. The alloy nested layer 9 is convenient for improving the thermal conductivity of the entire shielding layer and absorbing the heat absorbed by the insulating thermal conductive layer 6. The plastic reinforced protective layer 10 is convenient for improving the stability of the cable.

[0021] The reinforcement sleeve layer includes an inner lining layer 11, a first steel wire armor layer 12, a first anti-wear layer 13, a second steel wire armor layer 14 and a second anti-wear layer 15 which are arranged in sequence from the inside to the outside. The first steel wire armor layer 12 and the second steel wire armor layer 14 both include a plurality of steel wires distributed in a circular array, and the steel wires are arranged obliquely, and the inclination angle is 5-10°. The first steel wire armor layer 12 and the second steel wire armor layer 14 are arranged to facilitate improving the stability and tensile strength of the cable. At the same time, a first anti-wear layer 13 is arranged between the first steel wire armor layer 12 and the second steel wire armor layer 14, and a second anti-wear layer 15 is arranged on the second steel wire armor layer 14, which can effectively avoid mutual friction between the steel wires of the first steel wire armor layer 12 and the second steel wire armor layer 14, and at the same time, the second anti-wear layer 15 is used to avoid the second steel wire armor layer 14 from causing wear to the thickened wear-resistant pipe.

[0022] At the same time, the steel wire is tilted at an angle of 5-10°. The tilted steel wire has a certain bending resistance, which facilitates the winding of the cable on the mounting frame.

[0023] The three core parts 1 are respectively a DC core, an AC core and a spare core.

[0024] The thickened wear-resistant pipe includes a first PE jacket layer 16, a tensile layer 17 and a second PE jacket layer 18 which are arranged in sequence from the inside to the outside. The tensile layer 17 includes a plurality of tensile bars 19. The plurality of tensile bars 19 are in a corrugated structure and are distributed in a circular array on the outside of the first PE jacket layer 16. The tensile bars 19 are arranged in a corrugated structure so that the compressive resistance of the entire tensile layer 17 is improved.

[0025] Although the present invention is described herein with reference to a number of illustrative embodiments of the present invention, it will be appreciated that those skilled in the art may devise many other modifications and implementations that fall within the scope and spirit of the principles disclosed herein. More specifically, within the scope of the present disclosure, drawings, and claims, a variety of variations and modifications may be made to the components and / or layout of the subject combination layout. In addition to the variations and modifications made to the components and / or layout, other uses will also be apparent to those skilled in the art.

Claims

1. A special cable for AC / DC conversion, characterized in that: include: A wire core group, the wire core group includes three wire core pieces; a triangular isolation belt, the three sides of the triangular isolation belt are all concave to form an arc-shaped groove, and the three wire core pieces are respectively fitted into the three arc-shaped grooves; a shielding layer, which is sleeved on the wire core pieces; a cabling bundling layer, the wire core pieces, the triangular isolation belt and the shielding layer are all arranged in the cabling bundling layer, and one side of the three wire core pieces are all fitted and connected with the inner wall of the cabling bundling layer; a reinforcement sleeve layer, which is sleeved on the cabling bundling layer; and a thickened wear-resistant tube, which is sleeved on the reinforcement sleeve layer.

2. The AC / DC conversion cable according to claim 1, characterized in that: Three filling strips are also arranged in the cabling bundling layer. The three filling strips are respectively arranged in the gap formed between two adjacent wire core members and the inner wall of the cabling bundling layer. Two reinforcing ribs are arranged at intervals on the inner side of the filling strip along its length direction.

3. The AC-DC conversion cable according to claim 1, characterized in that: The shielding layer comprises an insulating heat-conducting layer, an insulating shielding layer, a water-blocking layer, an alloy nesting layer and a plastic reinforced protective layer which are bonded and connected from the inside to the outside.

4. The AC-DC conversion cable according to claim 1, characterized in that: The reinforcement sleeve layer includes an inner lining layer, a first steel wire armor layer, a first anti-wear layer, a second steel wire armor layer and a second anti-wear layer which are arranged in sequence from the inside to the outside. The first steel wire armor layer and the second steel wire armor layer both include a plurality of steel wires distributed in a circular array, and the steel wires are arranged inclined with an inclination angle of 5-10°.

5. The AC-DC conversion cable according to claim 1, characterized in that: The three core parts are respectively a DC core, an AC core and a spare core.

6. The AC-DC conversion cable according to claim 1, characterized in that: The thickened wear-resistant pipe comprises a first PE jacket layer, a stretching layer and a second PE jacket layer which are sequentially arranged from the inside to the outside. The stretching layer comprises a plurality of stretching strips which are in a corrugated structure and distributed in a circular array on the outside of the first PE jacket layer.

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